Most modern striker fired pistols are drop safe and have a little tiny trigger on the inside of the actual trigger that needs to be pressed, so that even an accidental pull on the trigger, like getting snagged on something, won’t fire the gun unless that little trigger piece is also pulled.
There is no decocker, or manual safety to remember to pull to simplify use of the gun. Apparently, the British army switched from high powers with a manual safety to Glocks in the belief that the high power was too dangerous to carry with one in the pipe because it was single action and, I guess, because safeties can fail. The Glock was considered, by them, to be safer with a round in the chamber and quicker to deploy.
Glock safeties can fail too .... there is an old thread on here about a Cop that shot himself in the leg (Calgary I think). In that thread, there was a lot of talk of the ins and outs of the technical aspects of the striker fired safeties. If you do a search, you might find some of the technical information you’re seeking there.