I have not had anyone modify my pistols for me.
I have one CZ75 Compact with a super nice trigger with the firing pin block intact/operating. I can't take credit for the crispness of the trigger, it's mostly due to the CZ spur hammer (Pre B style) I bought from CZ USA. Just an awesome trigger in SA. The pistol remains SA/DA in operation, I just carry it cocked and locked.
I have one CZ75 Compact with a super nice trigger with the firing pin block intact/operating. It was DA/SA and it is now SAO. I do not carry this one. The trigger is too light, in my opinion. Too light? When I'm at the range, shooting it for the first time that day/week/month and I send a bullet or two into the target before I'm really wanting to fire it, the trigger is too light. Was it pointed down range at the target? Yes. But I wasn't really "tuned" in with the sight alignment quite yet. This one has the CGW race hammer and adjustable sear and the straight SA trigger from CZ USA.
I'm trying to say, removing the firing pin block isn't really necessary to have a really nice trigger. It may be easier to get there without the firing pin block safety, but it's not necessary.
Carrying a SAO pistol shouldn't be an issue. I did for many years. Lots of people do. They work just fine if you know how to work them.