Thats a part of practical leftism indeed! Did the legalize end even the legal persecution of LGBTQ folks? Not entirely, look at the south. But it did( force a cultural shift. Suddenly it wasnt so cool to use gay as an insult and shit on queer ppl who looked/dressed/sounded a certain way.
The LGBTQ ppl in my life have been afforded the ability to step out of the closet with less fear than before. If im to march with them, this imperfect solution is working towards my ends as well.
Solidarity, comrade, regardless where ur politics are. I want liberation even for the righty whities that profess to hate us.