I've never bothered responding to this particular poster before because, well, I found your last explanation by far the most likely. In any case, there's this thing called a figure of speech and I think we can safely assume that when someone (incorrectly) says "every" (fill in the blank), it doesn't mean literally "every" (fill in the blank); especially if you are talking about a very large group. I don't think it's going out on a limb to say that there are a LOT of actors of color who are VERY interested in working for Marvel. Five years ago (and even more recently) there were a lot of complaints (rightfully) that CBMs were pretty much restricted to white people (very large majority of those men). Marvel has done a reasonable job of changing that....
Ehhhhh.....never mind. I'm digressing as usual. The point (if I'm making one LOL) is that I think that there is a recognition among the vast majority of black actors (hell, actors period) of both genders that making a movie with Marvel isn't the worst career move someone could make, AND there may be opportunities there. That's a good thing. I've mentioned this before, but just look at the quality of actors Marvel has been able to attract. It's really, REALLY impressive. Sure some actors may not be interested in doing a Marvel movie, but, given the nature of the business itself and the difficulties a lot of actors face getting work, I think it safe to say that's not generally the case.