Umm... just so you're actually on the same page as the rest of the discussion, I don't think any of us really care all that much about the diagnostic criteria and whether it has a physical, neurological, or psychological basis. Most of us do not care about that at all. The distress is real, we acknowledge that, so move on.
What the discussion has actually been about is the trans-activism, and it's effect on women and children. Like... almost the entirety of the past three threads have been focused on this topic.
I know you jumped in late here, but I really suggest that you take some time and at least skim through this thread in it's entirety. You don't have to read every post, by any means, but I quick run through to catch the highlights would help to get you on the same page as the rest.