Think about where the term literally stems from. A smoking gun may tell who did something and what he did. I have trouble imagining a gun (smoking or not) explain why he did it.
The fact that I'm asserting is that men do not suffer these kinds of attacks suggest the individual was motivated by sexism. I can't say anymore other than to say that you are wrong. I don't think it means what you clearly think it means. Sorry, no snark intended.