I maintain that if the gun is properly retained and handled (finger off the trigger) it cannot go off, this is my argument that you can safely wear your firearm with a round in the chamber, hammer cocked, and the safety on,
Like... okay, but that's just kinda' wrong. Those things do make it saf
er, but not
safe. Shit happens, and about the only way you can be
sure an otherwise functional gun is not going to fire is if it isn't loaded. Full stop. There's no guarantee for
anyone that they're going to be able to keep a firearm pointed in a safe direction in case of an accident.
We accept the risks for certain roles, and ideally provide the resources they need to mitigate them as much as possible, but that doesn't mean they aren't there (or a civilian can actually meet similar standards of mitigation, for that matter. Big ol' difference between being fed for keeping up to standard and having to feed yourself while keeping up to standard, et al).
E: ... any case, yeah, like basically every single bit of firearm training I've encountered over the course of my life have been pretty clear on transporting loaded firearms, with the directive about as clear and consistent as pointing it at something you don't want to die. Don't. Don't do it. The same alcoholic with a history with organized crime that taught me how to make pipe bombs when I was a pre-teen even repeated and was consistent on that one.