I don't know which communities you're talking about, but anecdotally I have to say I've found trans bars and support groups to have a much broader range in race, class, and origin than any other places I typically go.

Also, low testosterone you describe in that paragraph is not implicated as a cause of transgender behavior, with people generally being in the typical range for their birth sex before transition, which includes outliers with very high testosterone levels. Giving people additional testosterone has been tried and not been found to "cure" transgender behavior.

Relying on made-up facts for an entire paragraph of your purpose statement is not very encouraging.