competitions are won and lost in fractions of seconds. for the super rare occasion of something like this happening, the time cost isn't worth it. as noted earlier, with muzzle pointed downrange, in the rare instance this does happen, everyone is safe.
frankly with the safety so close to the trigger, it's probably a higher chance of accidentally hitting the trigger while safeing on/off than with a stray shell.
I'm with you on that one. A Mossberg receiver safety may not be bad, but too much fiddling around near the trigger...that could gett be worrisome
The best safety to use is the one between the ears.