ideological echo chamber populated by a academics who already agree with each other
Is there any part of academia that this doesn't describe? ;p
No but gender studies seem to live more isolated, (most) other part of academia at least have to deal with the real world once in a while, so while they're echo chambers at least sometimes some fresh words are said or people with other opinions enter. Let take economy, while it's a ideological echo chamber populated by a bunch of people who are a little to happy to hear themselves talk and who have found the truth, the only truth and nothing but truth, at least there's other economists who sometimes call them out on it. The only people in gender studies seem to already have embraced the starting premise of women as victim of male opression, which make it a much more closed forum.