Good idea; when exiting your car, make sure the safety is off on your concealed weapon.
That is extremely dangerous.
Getting out of your car is awkward, off balance and a great opportunity to drop your weapon or cause it to discharge while putting on winter coat, hat or whatever. It must stay in the holster, safety on, until required.
If you can’t thum the safety, get a revolver.
All my SIG SAUER hand guns have no manual safety. None go off by themselves without pulling the trigger. The best guidance is don’t put your finger on the trigger until one acquires a target.
Accidental discharge is not a real concern if you’re wearing the proper holster. What a carrier needs to train for is to extract the gun without putting a finger on the trigger.
You could weld the hammer shut and some fool would still do something to hurt himself.
Like.