I concede that this is the dictionary definition and is therefore used correctly.
Goodo. It's nice when people don't dig in, and we can agree.
but maybe acknowledge that pansexual is also in the same dictionary
I've never said otherwise, I just think it's a word often used to mean either 'bisexual and attention seeking' or, as op suggests, 'straight but has blue hair'.
I have no skin in this game so am happy just to take the piss about a very narcissistic seeming article; but I can see why gay people might feel their experience is being appropriated by people who feel oppressed but have never experienced homophobia.