This is an interesting point. The problem, I think, is that as individuals, we only have feelings based on our own experiences.

So, perhaps in an aggregate sense, there is more suffering of all the men men who are slightly stigmatized because they watch too much porn. But, none of them feel this as acutely as the single single sex worker who can 1) probably never get a more "legitimate" job again 2) may not be there of her own free will (yes, even if she is getting paid) 3) may not have any support network because her family has cut her off because of what she does (this is common).