The issue isn't that pornography is being criticized. I would criticize porn, and in fact have in this very thread saying it lacks oversight and regulation. The problem is that it is considered bad but no one can do anything about it because it can't be made illegal so it is pushed into the corner and forgotten about. That would hurt employees in any industry, not just porn.
What has been the central topic of this thread, even if it's not exactly the OP, has been whether or not porn is inherently exploitative of women. And not just generally exploitative, work in itself is exploitative in nature, but would porn, even with proper oversight and regulation, be harmful and exploit women to a greater and worse degree than any other job? I would say no.