All valid concerns, but the fact is if you accept the weapon and anything happens, you are at fault.
We’ve had people get issued, and immediately, check and clear their weapon in the presence of an armorer in the bucket, and get in trouble for it misfiring, despite the fact that it should have been checked and cleared prior to change of hands and in addition to the fact that you hadn’t been issued ammo yet. It’s dumb, but people die over this, so they are very strict, even when it sometimes seems unnecessary.