I didn't understand the CZ decocker when I bought my P07. I just knew I didn't want anything to do with a decocker. I installed the safeties and never looked back.
My previous experience with decockers is my Browning BDM. The darn thing works the opposite direction of the safety (up to fire, down to decock). And, when in the down position the pistol will not fire. So it's a combination of decocking and putting the pistol on safe. You have to move the lever to the "up" position to fire the pistol. Doesn't the Beretta M92 work that way as well?
The CZ's are "safe" when decocked, you just have to do a longer trigger pull.
Berettas are superb firearms; I owned an 8000 Cougar compact for a short time; but I never could get used to what seemed to me a 'backwards' safety. The ability to 'ride' the safety down with your strong thumb on a 1911 seems like the natural and safest way. I have a couple of 1911's I like, and switching back and forth from the Beretta to the 1911 was an accident waiting to happen. Something had to go, and it wasn't my 1911's.
My first CZ was a manual safety SP-01. It was easy to safely decock to engage DA using the 'thumb-roll' method with weak hand thumb between hammer and firing pin to prevent the hammer dropping on a live load. If I remember correctly, once the hammer is lowered to 1/2 cock, you
can't accidentally engage the safety. Yes?
Anyhow, once I bought my P-01, I decided to just stay with one CZ manual of arms so I traded my SP-01 manual safety for a Tactical, then added RAMI BD, P-07 and P-09. Each has their own personality, but they all (decockers) work the same. The Sig P229 Legion as well.
Anyone who regularly carries a 1911 would of course find a decocker useless and confusing, and for good reason. Staying with one manual of arms on your EDC's just makes good sense IMHO.