I think in the US (with rare exceptions) grown adults cannot choose to be sex workers (qua prostitutes). In e.g. the UK being a prostitute is legal, as is a private commercial deal between consenting adults (the age of consent being 18 as opposed to 16 off non-commercial sex). This would not be true in the US.
I have no problems with Maxwell being charged and convicted. The odd thing as Vixen says is the very selective conviction, other adults who openly admit to recruiting under age girls for sex seem to be protected. Selective prosecution is literally prejudice. The place for people to present their defence is at trial not in private discussions with prosecutors.
Maxwell is the only person prosecuted for these crimes, that does not mean we cannot consider that others were also complicit but are allowed to go unpunished.
We can consider that men who actually traffic and rape women are punished less severely than Maxwell e.g. Cosby, Epstein, Weinstein (well pretty much the same as Weinstein), R Kelly got thirty years for multiple counts. It will be interesting to see if any of the assistants of Cosby, Weinstein, Kelly are charged and convicted or because in those cases the principle has been convicted it is felt unnecessary to pursue other participants. That Maxwell was convicted but no other participants are does support the idea that she was pursued as a substitute for Epstein.
Maxwell was the product of a dominating father. She had just moved to New York, to a job and apartment effectively provided by her father. Then her father died, in itself this would leave many women emotional and vulnerable despite being over 18. However, this also meant she lost her job and her apartment. She suddenly became bereaved, homeless, unemployed, and poor in one go. This was the point that Epstein moved in on her, provided her with place to stay. We know Epstein was manipulative and controlling, Maxwell being an adult does not make her immune from being manipulated by Epstein. Once living with and dependant on Epstein it would be difficult to escape from his control. She and her legal team did not present this in her defence so rightly this was not considered in her punishment. It does not mean we cannot think about it. It is easy to demonise her but as we see with other women involved (but not prosecuted) women can be both victims and perpetrators.