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First of all, only about 2-3 % of the entire male population would be gay in general. The men that are attracted to heavy contact aggressive sports, are mostly the hi- testosterone type males, and are not the gay types. I doubt that many men in the NHL are gay. If there are some, I highly doubt they would come out of the closet. There is "no benefit" to do so, only discrimination.
If a male player is gay, there is "no advantage" for him to come out and declare. He would not get any endorsement deals from companies, and a lot of the fan base would turn on him-- "so why would he come out."
Case in point-- there's a lot of speculation that Aaron Rogers, NFL quarterback is gay, and his former roommate and lover had admitted this on social media. Why would Rogers come out of the closet ???- it would cost him millions -- "he won't" . He actually hires women to pretend they are his girlfriends, and pays them a lot of money, to do just that. Create a "straight image."
As for the women-- I can see the more hi- testosterone females coming out,( butch types) and there's a lot of those types of women that are attracted to aggressive sports. The more feminine women, just are not attracted to sports that much, and may be bi-sexual, but there are not that many. There's quite a few "openly gay " women's tennis players, and I won't name them here-- but there's quite a lot of them. You can sort of tell by looking at them, and the way they act. Samantha Stosur is one that is openly gay, for women's tennis players, and there are many others.
The women are "more open" about this kind of thing, because it's more acceptable, but I cannot see this happening with the men in sports. ( maybe the odd one ?? but I sort of doubt it)
I don't see much changing at all regarding the men in sports - "just not acceptable." to the masses.