I have no doubt there is a 'profit' element to it.
It's certainly become a niche that is now full of business opportunities.
Private councillors, drugs, surgery, clothes designed to 'pass', gadgets etc.
An awful lot of people are taking it in from:
a) people with a genuine mental health condition
b) from the larger majority of confused, possibly vulnerable people jumping on the bandwagon to fit in. Possibly a result if the seeming increase in gendering hobbies/clothes/attitudes.
C) perverts. Who have always been fairly easy to part from their money.