We have no choice but to keep an even more violent system because people who tried a less violent system were sometimes as homophobic as was standard at the time in most places.

Let us ignore the fact that the small island nation of Cuba has the best lgbt rights in the world. Let's ignore the fact that socialism most directly helped the poorest and most vulnerable of gay and trans people with their economic equalization in ways that "progressive" dictatorships of the bourgeoisie still don't. Let's ignore the fact that lgbt rights in the west were won by movements full of radical queer communists, not given out of the benevolence of capitalism.