It's very true, though. Why would the OP assume that somebody who likes superhero movies would give a two shits about Star Trek? I mean, realistically. They're all action movies, yes. But they're like completely different genres.
Genres are a taxonomy. Fan preferences can span and overlap the various genres and are much more fluid at a personal and demographic level.
There is some intersection of fan interest between Star Trek, Iron Man, and Man Of Steel. Based on the box office numbers, the intersection is much smaller than I would believe and I'm perplexed. I wanted some input and started this thread.