"So why aren't men selling their sexual services to women then?"
A quick search on adultwork escort directory shows one third of active UK escorts are male (although they do tend to have less feedback and lower prices).
"No one ever wants to discuss the attitudes of the clients."
After reading your post I get the impression you are just believing in what you want the truth to be. You seem to want clients to be misogynists who hate women etc. In reality clients are all different. Some clients are disabled, some clients are able to get sex if they want but don't want the complications that come with a relationship or one night stand.
"Do I imagine an hour-long meeting is all shagging? No idea. You tell me."
Maybe they have small talk first, or have foreplay or the client wants to act out a roleplay/fantasy or something. It depends on the client.
And not every client wants a sexual service. Some escorts are hired to accompany a client to an event for company or to go out for a meal.