This is sort of a stream of consciousness post, so don't expect any great insight.
That said, I spent a few months not long ago on the fetlife board exploring my feelings about BDSM. I regret to report that although some aspects of BDSM are very erotic, the vicarious experience I had attempting to network there really put me off the whole concept. To the extent I don't think about those fantasies much anymore.
The first thing is the level of stated and unstated contempt for we vanilli with our little fantasies. To role play a dom, for instance, seems to elicit a lot of derision as not being authentic. Duh. That's why it's called role playing. It's like wearing a Napoleon costume for Halloween. It's for fun, we aren't really going to invade Russia.
But if someone wanted a dom, they wanted an authentic dom. So that really put me off. I find the THOUGHT of giving a bit of pain erotic, yet I don't actually want to give any real pain. I'm vanilla. I never denied it.
By the way, they never said this stuff to me or about me. They were never rude to me. I just spent time reading their comments about other people and types of people.
Anyhow, I figure if I ever want to dabble purely at the couple hour fantasy level, I'll just try to hire a pro-sub and forget networking in the community