That's still paranoia given the lack of evidence. It's no different then claiming to be turned away from jobs for your gender or your race.
Politics, yeah that's something. Social views as well, but what industry/workplace doesn't have that going on.
Note, you still keeping pointing to perceptions yet not any evidence as there was back around 20 years ago or more for this. The stigma is gone, only people who think it's a factor, makes it a factor. That and the remaining small minded bigots.
Isn't it a little odd to ask for evidence over this?
I mean, it may be "well-known" in Hollywood circles that a relative unknown will have a harder time if they are out of the closet. I don't know, but it's not something that one can generally prove, rather an undercurrent that exists.
FOr example, you can say that the military is tolerant of soldiers who come out of the closet, but let's be honest, do you really not think there are difficulties with doing so.
Or let's look at sports. Why do so few pro-athletes come out of the closet during their playing careers. The number can probably be counted on one hand. Are you telling me there are no homosexuals in pro sports? Perhaps it is a perceived notion that they will be treated differently or ostracized. Again, very difficult to prove but it doesn't mean it doesn't exist.