Primary reason or not, I bet the activism is easier with some research to back it. In Finland, sex change is done with taxpayer money after extensive screening for other mental disorders. It's done because it helps, not because of political advocacy.
There are hypothetical treatments that would reduce harm ("it helps") in this sense that we would not use because of our current set of ideology/values. Indeed I think it likely this is the case.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.