When I felt I had to have a plastic pistol, decades ago, I handled a Glock, and then I commented to the guy behind the counter how I felt that the so-called "trigger safety" had to be the biggest joke, or, con job,.... in the firearm industry, to date.
When he asked "Why?" I told him, anything that can get inside of the trigger guard and activate a regular trigger, will do the same with this BS Glock trigger safety.
As stated above,... common sense is our best safety!
Even though the Glock turned me off, regardless of the "trigger safety",...
I went with the Steyr, which had the same stupid trigger safety,... which was understandable, since one of the designers of the Steyr came from the Glock camp.
I have no thumb safety on my M&P Shield, but I have a pocket kydex holster that COMPLETELY and SECURELY covers the entire trigger guard,... nothing can get the that trigger,... period.
I couldn't get the same kydex for my latest piece, a pocket 22lr w/pop up barrel,... so, I went with this,...
https://garrisongrip.com/micro-trigger-stop-holster/
I had to wrap some tape on it, to get a better fit, but, with a thumb safety and this "behind then trigger safety", I feel no need for one of the loose ballistic material pocket holsters I have in the storage drawer.
No one knows exactly how this tragedy happened,... but the guy carrying,.... we can speculate and voice our opinions till the cows come in,... only the father knows the truth.