Yes, but I can't fathom that such an obscure disease is becoming more and more common.

You know what else is becoming more and more common, to the point where it's ubiquitous? Pornography. It's everywhere. You need to get out of this strange mindset of a sharp distinction between psychiatric issues and "free will." Pornography is a technology, and technology creates feedback loops in its users. It conditions them and changes the reward systems in their brains. And lots of AGP men have self-reported "discovering" their trans identity through the consumption of pornography. Their presentation of their new-found identity tends to be in the form of the most clichéd porn caricatures of women. They want to become the object of their own desire.

Trust me. You are reinventing the wheel here.