That seems to me a difference of degree, not of kind. Sex workers are not the only women to face denigration in work, nor is their denigration purely gendered. I don't disagree that these issues are significantly more pronounced in sex work than in most other forms of employment, and so demand special attention, but to proclaim that it needs to be uniquely met with the full force of state repression is a leap of logic that nobody has yet take the time to support.
I think that the issue requires special attention, as you acknowledge, is in and of itself the crux of Defiant's point. He is simply uniquely frustrated in what he must regard as a flippancy over so crucial an issue, hence his position.
The current problem with sex work, the "prostitution industry," if you will, is not that it is sex work as such, but that the way the industry works, and how those careers manifest themselves in all practicality, are often destructive of women. The issues are myriad: you have businessmen murdering prostitutes, pimps slappin' ho's, STDs running rampant, and the fact that being a prostitute
in general is not a safe occupation
unless you have a pimp, who himself is a male and by inference in a position of authority over you. But on top of all of this, and the reason Defiant is upset, is the fact that many women go into this admittedly dangerous industry not necessarily out of their free will, but because they have no other options. They make 70 cents to the man's dollar in virtually all other lines of work, get stuck with children on a semiregular basis, are treated unequally by health insurance companies
and the law - you see where I'm going with this, I don't need to belabor the point. The system, in all its capitalism and misogyny, has forced these women into this line of work which is dangerous and
uniquely dangerous for women. It is an exacerbation of the unequal treatment women are already forced to suffer. If the system did not exist in its current sense, or perhaps existed in some unimaginably different sense, there'd be no issue. But, it does. Hence the opposition.