I think you are right.

From the little biopic accounts I've read over the years the clients and professionals come to the space from different directions.

The subs stumbled across a kink button that is extremely stimulating. The professionals got introduced to the kink, found it fitting well with a new narrative that works for them.

I don't think it is all gloom. You can always find an open minded person occasionally who is interested to hear about something outside of their world.