Ok, I'll bite.
1 the system is as finicky as any other semi auto pistol. When properly mantained and in good condition it does not misfire, in fact it has a very positive strike on the primer, and it does not jam more than any reliable semi auto. It's true that all of it's parts have to be adjusted to the individual pistol, a mixed parts gun will most certainly have issues if those parts were not fitted by someone who knows what he's doing.
2 yes, it may not be mechanically sound. There are gunsmiths for some reason, right?
3 that one is a joke. The Luger has a loaded chamber indicator (except for the very early variation) and that is a thing most pistols don't have. And if it has a round chambered it's ready to fire.
4 not unsafe to holster it has a very good manual safety. Some of them even have a grip safety. Of course there are people that can manage to shoot themselves with a banana.
Using an Hollywood movie to prove a gun related point is moronic, to say the least.
Hope you're satisfied with the answers.
