I am an engineer and part of my work requires being versed in industrial safety. The "safety is between the ears" argument is great; the "safety is
only between the ears" argument (which Glock zealots love to repeat) is false and in my line of work will get you in trouble really fast.
Everybody, even the best trained and most experienced people, make mistakes.
Sometimes they get lucky and nothing happens.
Sometimes they make mistake and don't get lucky and then you have an AD/ND. Calling them "idiots" when there absolutely nothing in place to prevent the gun from firing if trigger is
accidentally pulled on is wrong and counter productive. Yes, trigger is not supposed to be pulled accidentally; clothing is not supposed to get in the way; the gun is not supposed to get worked loose while in the car; but it happens. And a reasonable measure of safety is always better than no safety at all. Glock doesn't have a trigger safety - it has a device that prevents accidental discharges by other reasons.
I still bough Glock because I really like everything else about this gun. I installed an aftermarket Siderlock safety on it that's mounted on the trigger. It's very intuitive, easy to install with no gunsmithing experience, and because it's in a rather unorthodox location, it may stop someone from shooting you with your own gun. Now I heard people say that it defeats the purpose of safety being inside the trigger guard; not really. I will not deliberately place my finger inside the trigger guard unless I am ready to fire - at which point I will deliberately disengage the safety and place my finger on the trigger in one motion - and at all other times the safety is on and doesn't need to be touched.
Here's a photo of this device (the round pin on the trigger):