Horse-pucky.
Firearms are simple tools with few moving parts and operating firearms safely and responsibly is common sense. The Four Rules are simple enough and one has only be willing to implement these simple, common sense rules. If you have a drivers license, operating a firearm safely should present no problems. I was first taught the rules when I was four years old. I've had no problems with my Glocks. They go bang every time you pull the trigger and never when you don't. I don't see a problem there...
The main reason is trigger weight. DAO hammer fired autos and striker fired autos have almost twice the trigger pull weight of a good SAO trigger--6 to 8 pounds for the former vs 3 to 5 pounds for the latter.
The presence of a safety does not excuse poor judgement. If you aren't comfortable carrying a handgun without a safety, you might be relying on the safety too much.
I've tried to get my G20 to drop the striker getting clothing or the thumb break of my holster in the trigger guard. In order to even get something into the trigger guard, it has to be pointed into the body at a ridiculous angle--you basically have to try to accomplish the feat--like you're trying to shoot yourself. It is very hard, nearly impossible to accomplish. Even then, I've never been able to discharge my Glock with anything other than my finger. And if you drop the slide on any auto while chambering a round with your finger on the trigger, it will discharge, including a 1911.