Because it takes the form of identity politics whose usual implications are embracing various forms of weirdness, intellectual mumbo-jumbo, and celebrity cults with zero appeal to people who have to earn their living instead of living off their trust funds. I would rather see a "bread and butter" organizing, unions, and party discipline.
While we are at that, why did not you mention the unioninzation of NYU graduate workers which was a *major* union victory against academic estabslishment, a bread-and-butter remarkably free of usual symbolic contents?
wojtek