I think when you look at these types of groups that become cult or cult-like, they often appeal to a specific experience or need that people have. My guess is the message that many trans and autistic people take away is fulfilling for them. Many people in these communities share similar traumas and challenges that affect them deeply. It makes them vulnerable to manipulation and becoming true believers capable of more extreme behavior.

The more common pattern is a false prophet cult where the influential leader is a paternal figure bringing enlightenment to the flock. It just so happens that free labor and sex with pretty girls are key aspects of that journey.

It doesn't mean that "all X are Y" or "Y's are usually X".