I don't know how to put this in a way that doesn't sound very disrespectful.
One of the main purposes of prostitutes was to act as listeners. Yes sex with no strings attached, but prostitutes also served as women to whom men could talk to without being judged by, or at least it didn't matter if if they were judged. You know, the usual stuff about men having to open up yadda yadda. This is, I suspect why we had prostitutes at all in the really old days. If it was just about sex, slaves would have been enough.
But with the rise of pornography, men had a cheaper and simpler alternative to prostitution. I mean obviously the industry is still alive, but it's no longer that important, with OF eating in their business.
But men still need to be listened to.
And this is where vtubers come in. People just have to realize it.