If you dont trust the internal safeties of your carry gun enough to carry with a round in the chamber, it is probably time to go shopping for a better one.
Internal safeties do not eliminate things that may snag, etc... and actuate that trigger. Nobody is saying is just going to go off because the safety well fail for no reason.
People, especially new, are a little apprehensive at first. That's fine and natural. Carrying is an exciting and new existence at first and definitely had a learning curve that should err on the side of safety. Until they get their confidence and carrying mojo goin on.