Sex work is horrible, end of story. All victims of SW have "pimps" who control and abuse them. For example, on "the streets" most workers are women or children that come from poverty and abuse. The money they get are shared unequally to them and the pimps. They don't get paid enough for food, shelter or basic necessities. After a certain period, the victims give up and accept this sort of lifestyle. The pimps also hit the victims, and humiliate them in the worst ways possible.
In porn, which is another type of SW, most women are often trafficked, drugged and raped. Also, every "teen" porn video contains people under the legal age, sometimes even 14. The actors are often paid terribly, even as low as 50$ per video while working at big companies.
Let's do not forget the "hardcore" stuff. BDSM videos give people a twisted way to look at women and often hurt women even if they don't fully consent to it. Some of the worst industries are into feederism and anorexia fetishism. Most people in those videos are often dead due to health problems. On top of all this, those also contain medical fetishism(oxygen masks), due to the actors illness from the abuse.
The men are no better in this industry, if they work for a prolonged period of time, they'll need Viagra to function properly, sometimes even going as far as needing to inject it in their penises.
After you're "used too much" they'll throw you out and leave you with no support from anyone. Your family will be embarrassed, and you won't have friends because you're "busy" all the time. You waste yourself to the point of no return. 60% of SW victims have suicidal idealization, and 10% go through the act.
You won't "get rich quickly" by starting an onlyfans, you're going to get little to no money and then quit, or you're going to get abused in the industry. There's no third option.