It's the same with other woke causes as well, not just restricted to LGB issues (or, indeed, to the United States): grievance is big business.

When your bread and butter comes from telling people how racist / transphobic / homophobic / cisheteropatriarchal... they are, of course you've got a vested interest in keeping the problem around. I've always wondered a similar thing about researchers who work towards curing cancer. Aren't they going to be at a little bit of a loose end when you realise you've put yourself out of a job? (No, because cancer researchers will research something else I'm sure).

People like Robin DiAngelo don't want racism to cease to exist (it probably never will, so phew for her) because then who would buy her books or invite her to conduct anti-racist training? Similarly, if trans people get everything they want then they can't be the capstone of the oppression pyramid. And what then? Breathe a sigh of relief and get on with your life? Quietly? Like those faggots? No ma'am (it's sir!).

Edit: 'Capstone' wasn't the word I was looking for. It should be 'pyramidion'.