Acting is kind of difficult to intellectualize - it's a far more visceral experience. It's really hard to be able to think about and then employ these kind of esoteric notions of this person's backstory and try to weave it in somehow. It's just kind of impossible.
The pervasive idea is that if you're a man in the fashion industry, you're gay until proven otherwise. And of course there are lots of men who aren't. But people make certain assumptions.