I think they’re people who understand basic firearm safety but don’t understand extenuating circumstances or the fact that movies tend to use real firearms shooting specialized ammunition.
And the fact is that if you hang out in weird places you’ll meet people who think they know what they’re doing with a gun and really need to be following the first rule of firearm safety (don’t point it at shit you don’t want to destroy). People like the sort who bring unloaded guns into the bedroom or who point them at friends as a joke. You know, morons (and I say this as someone who does do dangerous shit for fun). But there’s a difference between touching an electric wire because you shut off the circuit yourself and touching one because a master electrician assured you it’s safe.