As someone who is gay and came to terms with it relatively early, had you read my thoughts when I was teenager you wouldn't have known about me unless you were specifically looking for it. Denial is a more powerful state of mind then most people understand. I would literally be reading the Uncanny X-men issues of Northstar crushing on Iceman and think to myself "this is interesting but so weird, such an alien concept", even though by this point I was already attracted to guys, just not consciously. So I'm just saying that just because we've had thought bubbles from a character over the years, doesn't mean that character can't be gay. And even if we can read these character's thoughts, if said character would be in denial it wouldn't come up directly in their thoughts ever, in my experience at least. You do everything subconsciously to not think about it, and avoid situations where you would be forced to think about it.
And as far as someone being gay being a big huge announcement, that has to do with society, and you can see the change too. It used to be that if a celeb came out, then there would be a lot of headlines about it, regardless of the level of fame. Nowadays it isn't seen like AS much of a big deal, for B-list celebs and below, however if someone like Leonardo DiCaprio or Chris Evans were to suddenly come out, it would definitely be a big deal. Until society reaches a point where being LGBT is truly not stigmatized anymore, not just in one part of the world but worldwide, this kind of stuff will still be considered significant.
Just my 2 cents about this particular argument, I don't really have any thoughts about the topic otherwise.