It's not just "pro-affirmative-action stakeholders" that are expected to respond. _As referenced in the article_, it's extending to expecting women to come up with responses just because they are women. You're talking about a situation where one side (the side of the manifesto) has dropped an "evidence bomb", some of which may be valid, some not, and is now complaining "why won't you have a discussion?" They weren't invited to a discussion, they weren't talked _to_, they were talked _at_, and are now being looked to as the defenders of their gender when they just want to do their damn job.