BMM can obviously speak for himself, but maybe it'll be less incendiary if I take first crack.
1. Lots of guys like to see sex workers with whom they have "nothing in common" precisely because they think it expands their pool of experience to be exposed at close quarters to the type of people they ordinarily wouldn't deal with.
2. You're being a bit unfair to the women BMM sees. He never said they were inarticulate; all he said was that some of them didn't finish high school. I'd be surprised if they were unable to carry on a conversation.
3. You have to understand that many guys do not look for much in the way of personal interactions in commercial sex sessions. And that there's nothing wrong with that. If anything, that might well be healthier than guys (like me) who seek some simulation of "friendship" along with the sex. The guys who seek sex and nothing more keep a firm eye on what it is they're buying, and there's no danger they're gonna improperly breach the boundaries between them and the women they buy sex from or get confused about the nature of their relationship.
Of course, the experience is different for the sex worker. Anyone who sees BMM is gonna have to be ready for 3 hours of sexual activity, all of it based on pleasing him, without a lot of surrounding niceties that make it seem as much like a social interaction as a commercial sex session. But nobody said being a prostitute is easy. And note that every prostitute who has ever commented about it publicly has gone out of her way to say how great BMM is as a customer: he's nice, he's respectful, he's appreciative, and while he's demanding it's only within the proper bounds. He may expect a lot, but he doesn't expect more than he's entitled to.