Did people forget that homosexuality is a deviant lifestyle that is still not in any way the norm, and when representing the norm it is not at all unusual to leave out things like homosexuality? Yes, it is normal that homosexuals exist, they are very real people etc. but that in no way makes interaction with homosexuals or being confronted with homoSEXUALITY normal in any way.
And I can make the same damn argument for autistic people, I am autistic, apparently over 10% of the human race is autistic, yet media rarely acknowledges autism and when it does so it's in extremes, I feel this game doesn't do right by autistic people and it is erasure that they didn't include autism as a theme in this game.
So tell me, where does this stop? Bestiality? War? Racism? Scat? Gore? Torture? Murder? all very real, all TOO real, which is exactly why games tend to not include them, especially when catered to a specific group of people, especially when catered to children. And lets be real here, games and any kind of product made for children generally isn't allowed to deviate from the norm, which homosexuality is far from.
Nintendo never claimed to be all-encompassing in it's representation of human interactions and lifestyles, never meant for it, you can take their words out of context or claim "with us or against us" but the great irony is that it is YOU who is the bigot for even making that suggestion. In your desperate struggle for acceptance, you've forgotten to accept that there are people out there who cannot accept you, and those people do so for real reasons, your stigmatizing of these people is the very erasure you speak against.
*edit*
Kind of went off-tangent in the last paragraph there, but to clarify the point is to not try and force people to acknowledge or accept you, just be who you are and feel free to defend yourself if the notion is ever presented that you are not allowed to be who you are, but don't go out of your way to demand representation of your lifestyle, that'd just get ridiculous if everyone would try it.