What troubles me about this whole debate is how everyone claims to know what the 'sex workers' want. But - and this is my interpretation as someone who conducts research with excluded groups - I don't hear their voices in this. I hear them being spoken for by various groups and for various (implicit and explicit) reasons. Including us, here. This concerns me greatly.
But one voice of a sex-worker organisation was cited right near the beginning of the thread - and then universally shouted down as nothing but "pimp lobby", because they dared to say the opposite of what we say "for" them. And obviously we know better than they do.
To be sure, that's only one organisation, and it doesn't speak for all or, AFAIK, even most sex workers. But it's a start. If someone has information or a policy statement from another organisation consisting of sex workers themselves, then we can consider that too. And if it gives the opposite POV, we can talk about why.
But you can't have it both ways. You can't say how important it is to listen to what sex workers themselves say, and then immediately reject and vilify them the moment they fail to say what you want them to say. Doing so in response to that Guardian article, which was about highlighting exactly that problem, is particularly ironic.