I agree.
I think this is not so much as to disarm the people (even though it is moonbeam’s Californistan) but people may put stuff like passports and other important documents in these safes. So it maybe a matter of matching up the documentation found (if any) at the remains and the missing persons roster.
From the looks of the completeness of the burn in most of those pictures I doubt that the contents of those gun safes survived.