BlackHeart Biohazards

I’m afraid this might be a problematic type of shipping, maybe even for some proshippers, and it’s definitely fuel for antis to use against us, so if you want to ignore this ask, that’s ok. First of all, something everybody agrees is ok is when we write/headcanon straight characters as queer. I do that myself often, main example being Steve x Bucky Barnes, IMO much better chemistry than Steve x Peggy. But what about the other way around? There’s this gay male character that I believe has incredible chemistry with a female character (I actually headcanon her as his “only exception” and he sees himself as a gay man who happened to be in a straight relationship), but we’re often told it would be homophobic to ship something like that. Yes, most homophobes would indeed do that, but I can guarantee that if I count the number of straight characters I ship with same-sex characters it would vastly outnumber the very small number of gay characters I ship with opposite-sex characters). Is there any proship statement that says something like “shipping canon straight characters with same-sex partners is just as valid as shipping canon gay characters with opposite-sex partners as long as you’re not a homophobic jerk IRL?”