Leaving people to go full Lord of the Flies on their sexual urges leads to violence and fear and resentment.

I don't think this is unique to sex. Sex is often special-cased in ways I don't think it really needs to be. We probably agree more than we disagree here.

By contrast, if your basic needs are guaranteed, sex as a profession becomes something you can choose as an entrepreneurial passion rather than a lifeline for your survival.

No argument here. Basic income and the essentials guaranteed would solve a lot of problems for a lot of people. Certain members of the wealthy would be upset, though