You say it's not important to relate 100%, and that's true.

But when you're a child, who is gay, and every single piece of media around you is telling you that girls can only be with boys and vice versa, it can make you feel like something is fundamentally wrong with you. That you won't ever have love like the Disney princesses did because you don't want a prince.

Say I'm a middle eastern girl, and I fall in love with Ariel's story and her love tale, but I can't relate to her because she is white. Okay, well, Jasmine exists and gets a love story as well. I can know that at the very least there's another movie where there's someone like me. My intrinsic qualities are represented elsewhere. And until recently, that simply wasn't an option for gay people, except like you said, as token gay characters.

Nobody's saying we don't want well rounded LGBT characters. More often than not, these days at least, the gender of the individuals isn't the most relevant thing to the plot. People can make the active decision to be like, "hey, instead of making a female fall in love with a male, we can develop the love interest as a female instead." That doesn't harm anyone and helps people find someone who represents them. And that's what we wanna see.