Assuming a song means something it doesn't flat-out state is not good. I like having possibilities. There are nail-it-down types, and I don't understand that mind-set, but those folks exist.
So Willie o' Winsbury? Maybe, maybe not. I've heard straight guys say the same sort of thing. I think they were trying to signal open-mindedness and understanding. Again, an assumption.
I think there are very few nailed down LGBT-oriented songs.
But can anyone explain (yeah, Sam got a good gig, and they're all a little jealous. Unless they're being ironic, but I don't know.) how a bunch of men singing a wistful sea shanty about a departed man isn't homocentric? Sam's gone away (I looked for a version I liked, and I'm obviously irritated by a lot of things, so this one was one of the best. It's hard to ignore the weird owl calls ("WOO" in the chorus, but I'll just let it go.)