I think a great example is OnlyFans. Pornography is close to full sex work, so it's a fair comparison. Here was a field that was dominated by predatory companies and people in the worst places. Actors and Actresses frequently talked about how they were abused, pushed beyond what they thought was acceptable, underpaid, hurt, raped, and honestly still worse.

Enter OnlyFans, a more legitimate way for workers to create their own content, their own pricing, set their own rules and their own boundaries. By legitimizing pornography and pornographic actors it made the entire thing safer for the workers themselves.

It's natural that sex work would follow this. It's wildly known that sex work is not a safe business, and it's extremely predatory. Taking our opinions out of it completely, if the options are A) let the extremely terrible and predatory underground business continue as it has or B) legitimize the business, add protections, and allow them to set their own rules - well then, isn't the moral option obvious?