I'm very sure this is a very specific fetish. Being a prostitute or similar is not a rare fantasy among women, but I don't remember how much it is. About troons, it could be either the fantasy of a man who believes he will be more validated as a woman if men pay for it or plain misogyny by believing that's all women can ever be and that all women are whores who are for sale. I'm not trying to shame people with those fantasies. If a woman's fantasy is to pretend you're a prostitute, whatever, more power to you. But this shit is very disturbing because you're talking about minors...
I'm a little bit late; but, I want to share some context for the sake of this thread since many troons have their roots here in these fantasies. As someone who's been working with and friends of erotica creators (eBooks and online comics) and specializing in different audiences, this is a niche, and the patterns do diverge.
Prostitution fantasies for women tend to involve fantasies of being in roles like a courtesan or a burlesque performer. The character they imagine themselves as still has autonomy. Often (but not always), the story involves a woman who is in a bad situation and rose to the top by making the best of her circumstances, or saw opportunity and took the leap on her own in a society where her options for self-sustenance and power were otherwise limited, such as in historical dramas. There's a high degree of glamour. It's over-the-top, but still safe. Sex in these fantasies is always the result of good chemistry, and not necessarily always with clients which may even introduce taboo factors and love triangles. There's often a huge emphasis on them being able to pick their clients, too. They're protected, adored, and endeared. It's pretty harmless.
To compare it to what these kind of men imagine: their prostitution fantasies either involve sissification, transformation into a woman, or being a woman from the get-go. Degradation plays a key role. Sex is predominant; rape-until-you-like-it(or not) may be a part of it. So for:
"it could be either the fantasy of a man who believes he will be more validated as a woman if men pay for it or plain misogyny by believing that's all women can ever be and that all women are whores who are for sale," it's actually both; though I have no idea which came first, or if it's comorbid, as I've noticed that a lot of troons are also misogynistic.
The aesthetics are grotesque and what I can best describe as "strip club chic." It really boils down to "I get to have sex and thus lots of fun." The only "empowerment" is the man's freedom to turn into his own fantasy and be an enthusiastic fuckdoll in a world where these kinds of things are normalized. And with that normalized world, then yes, some do extend that to minors in said world.
As we've seen, it's a fantasy often held by people with a waning ability to distinguish reality from fantasy. They feel entitled to make it real. It makes the entire situation with Jazz and the people who get involved with him all the more disgusting.