You don't have to be against prostitution to be against pushing stereotypical gender roles.
Are you sure this is not really about being uptight about sexuality rather than gender issues?
Yes, they do, that's the whole point. If they were showing something that only women could possibly do, it wouldn't be pushing a gender role.
Are you sure this is not really about being uptight about sexuality rather than gender issues?
I don't know what you mean by "this". Of you're asking me about the intentions of the people who are criticizing the ad, I'm sorry, but I forgot the mindreader at home.