If you dont think right now we have opinions as controversial as "Gay people should be able to marry each other if they want" was 100 years ago,an opinion which right now we consider almost self-evident, I would urge you to think harder.
As others observe, those exclusive communities were the precursors of our inclusive communities. They gave the marginalized a safe space to learn acceptance, confidence, and toughness, and take that out of their safe space. And no one is a member of just one community, isolated from the rest, even when we try to be. The issue seems to me to be less about how exclusive of opinion those communities are, and more about how freely one may join and leave them while staying within bounds.
This separation would be good. It would mean that LGBTI humans would be able to find their own communities without cispeople getting weirded out.
Right now everything about my gender is verboten because it is sexualized.
Overreliance on youtube means that medical information around gender issues has to be "coded" so as to not trigger banning.
Facebook outs people with their stupid names rules that puts real people in real danger.
If everyone was being deplatformed then there would be the platform diversity needed.
Not having the stigma is good overall, but in many places there's no longer queer-exclusive spaces. That whole segment of culture is rapidly becoming a thing of the past.