it's not really relevant whether or not the arc was originally about sexuality. What matters is what the arc is in the final product.

This is one of the stupidest takes I've read on the topic.

Do you believe that if an author writes a book, establishes whatever, and then later changes a detail so that all that establishing information turns out was just wrong all along, "what matters is what they most recently shat out on twitter", and everything else can safely be ignored?

Probably not. But when it's a gay character, oh, yeah, I mean, there's no room for discussion whatsoever! We must take everything at face value! Except the things that don't support my refusal to believe a character could've been written initially to be gay, those must NOT be taken at face value AT ALL. Only things that support how I feel get the face value treatment.