The mods will regularly remove flags from articles that are coming from a progressive point though, so I don't think the "no flamewars/flame bait" actually holds water.
Rather, it's the moderators deciding that this submission isn't "interesting" and therefore remains flagged while the umpteenth anecdote about "X is discriminating against women" is interesting and novel and is totally not flamebait or identity politics and is therefore protected from being flagged.
It's fine, it's their site. I don't think it's useful to have illusions about it though.