I think mutual consent and money for sex are probably fine.
The problem is that reality isn't black and white. Trafficking is very real, especially in Chinese communities, where victims are shuffled all over the place on cheap intercity busses.
These are complex problems, and the typical HN lazze faire approach doesn't address that complexity.
Voluntary in the sense that people are working off some "debt" owed to smugglers that can never be repaid.
Chinatown busses are a snake pit of all sorts of crime. Here's an article that scratches the surface. There are numerous sources in the news and academic publications about the links to sex and other human trafficking to these busses.
You are right, these are indeed complex problems, however this is no directed effort against this type of activity.
If anything, having a common platform would make it easier to focus on such things, and I suspect platform owners would gladly cooperate (as they probably would on weeding out underage ads, etc.) -- but in practice, the alternative we see is either going for low-hanging fruit (which these relatively complex operations aren't), or just a blanket effort, like in this case.
All of these hurt legitimate workers far more than the operations you describe.
The problem is that reality isn't black and white. Trafficking is very real, especially in Chinese communities, where victims are shuffled all over the place on cheap intercity busses.
These are complex problems, and the typical HN lazze faire approach doesn't address that complexity.