Hey Baz, thank you for the thoughtful empathy. It is really appreciated.
The problem here is conflating sexwork and trafficking. None in the prohibitionist camp wants to answer why they're targetting sexworkers, when trafficking is a wider problem. In fact, focusing on sexwork derails from anything being done about the real problem. As for the harm sexwork causes? I think all of us here, including Baz, knows that this is not the case. In fact, I would argue working in a call centre, in a convenience store, in a pub kitchen, as a soldier, or as an emergency response professional is much more damaging to your psyche. The rate of cases of depression, substance abuse, and PTSD is pretty rampant in these supposed noble professions.
Street-level sexwork is pretty bad, but it will continue, as others have pointed out here. Harm reduction strategies are proven to reduce its risks, punishment strategies exacerbate them. But prohibitionists don't see that, they wish it weren't so. They put their vision of the world, their morality, as more important than the reality, and people, providers, providers' partners, and clients, will be harmed by the acheivement of their agenda.