The broad statements by an "experienced professional writer" is BS at best and negligent at worst. It comes down to the individual shooter. DA/SA is perceived as "safer" for carry, particularly for the newer or less experienced. Less likely for ND while holstering. As noted, striker fired is the new norm but that doesn't mean a better platform.
Unless the gun handler has a thumb pressing against the hammer while the gun is being holstered -- and not everybody is convinced that's a necessary step -- a decocked DA/SA gun encountering an obstruction in the holster can STILL have a negligent discharge just like a striker-fired gun (that doesn't have a frame-mounted safety). The trigger weight (and trigger travel) of a decocked SIG or decocked CZ is just a bit longer that a stock Glock. All of those triggers are much easier to press than a Glock with the heavy NY trigger -- which feels like a DA revolver. And if you're holstering a striker-fired Springfield equipped with a grip safety, like my XDm Competition, it's even harder to have a ND while holstering. (When I first got my XDm Competition I was ready to trade it away, because I often didn't get the grip right in my hand, but that's no longer problem -- but I'm not sure I'd ever "carry" that gun.)
I would argue that concern about Negligent Discharges -- thanks to the internet -- has been blown all out of proportion to the actual risk. I'll agree there seemed to be a lot of NDs when Glocks were first introduced in the Law Enforcement Community, but I'll argue that those ND's were a training issue! People are learning and training has changed and more attention is paid to being sure the holster is clear before inserting the gun.
I'll argue, too, that
most LEOs -- and they were the majority of the "victims" in the notorious NDs videos that appeared on the internet -- are NOT "gun people." Most LEOs spend even less time at the range, after their initial training is done, than most of the handgunners participating here. (Many shoot maybe 90 rounds every 6 months as part of their continuing recertification process.) Many (maybe most) LEOs view their handgun as a weapons of last resort, and are far more likely to use their batons, pepper sprays, and TASERS being used before moving to a firearm. (If there are shots fired before or when they arrive at a location, they don't go to the pepper spray first.)
I also know, from years of observation, that darned few negligent discharges occur while holstering. Most of the ones I know about occurred 1) with "unloaded" weapons which are being handled out of the holster, or 2) while practicing presentations at the range, and in that case it didn't seem to matter whether there was a frame-mounted safety or not.
A consistent trigger pull is easier to practice and repeat but how many instances in a real defense situation will play out the same as a range practice? "Hey bad guy, stand still at 7 yards and face me while I aim standing still in my Weaver Stance!" If you are an average CCW holder and practice only occasionally then maybe a consistent repeatable trigger pull will help in a defense situation to hit your target. But if you are the least bit conscientious and practice regularly a DA/SA is easily mastered and gives an added measure of safety to an ND in a stressful situation. A "deliberate" long first pull can make the difference.
And how does an inconsistent trigger pull -- due to the transition from DA to SA -- makes it any easier for "the average CCW holder who only practices occasionally" to hit what he or she is trying to hit when they are confronted with a real life-threatening situation? Have you had that REAL-LIFE experience where you've put your hard-earned skill to work?
I've seen a number of shooters who HAVE mastered the DA/SA transition at the range and in the gun games, but I've also seen a lot more, at the range and in the gun games, who HAVE NOT mastered the transition. First shots may be on target, but followup shots aren't always where they ought to be. Or vice versa. (But that can happen with striker-fired guns, too.
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As Ernie Langdon professes. It isn't the weight of the first trigger pull but that long distance travel of the first pull that gives the the margin of safety in a defense situation. I have 10,000 rounds of practice through my Sig Legion P226 SAO. It was to my chagrin that in an 8 hour defensive shooting course I failed to release the safety at least once while under stress. I switched to DA/SA for carry because I wanted to eliminate the slight chance I'd do the same thing in a real defense situation. I ran a defensive concealed carry course recently with my CZ Shadow Line Compact Custom. Over 400 rounds in an 8 hour course. I have to say under stress I never failed to make the first shot. The DA pull was always accurate and the following shots just as accurate.
And how does that 400 rounds in an 8-hour course really differ from "range practice"? In such courses, the only thing at risk is the shooter's EGO, and that's generally not life threatening. That course is NOT a real-life situation, and the target isn't attacking you. How does YOUR good performance in that classroom environment -- also a non-life-threatening situation -- make your proficiency there any less suspect than those who do well at the range using a striker-fired or safety-equipped SA gun?
I would note that your CZ Shadow Line Compact Custom wouldn't be legal in California: no firing pin safety. Doesn't that lack of a safety feature cause you some concern? You might say you've never dropped your loaded weapon, or had it smashed by a blow. Perhaps, true, but how is the likelihood of a drop happening at home or at the range any different than NOT releasing a safety in an 8-hour course?)
I've presently got only one decocker-equipped handgun -- a Sphinx SDP -- and I don't carry it. The rest are SA (C&L), DAO, or striker-fired. If I'm ever forced to use my decockcer Sphinx in a self-defense or home-defense situation,
and I've got time to do it, it will be cocked before I pull the trigger. (I also have a Springfield XDm, previously mentioned, with only a grip safety -- I don't carry it, either.)
You're happy with DA/SA guns. That's good. You've worked hard to become proficient, that's good, too. But some of the rationale you've used to support your use of this design is just as shaky (or incomplete) as the arguments you've used to disparage the striker-fired and Cocked & Locked designs and others use to DEFEND their use of C&L and striker-fired guns. Let's hope that none of us EVER have an opportunity to find out if we're right.
