I'm not a woman, but this doesn't seem like a trivial issue to me. Basically what they're saying is that if you're a woman, you have to invest more time, effort, and money into your wardrobe or face systematic bullying from your peer group. It's almost like a tax. And when money is involved, it seems to me it rises at least roughly into the same echelon as the pay gap, for instance.

One might say men have something similar with... I dunno. Power tools or something? But I don't think a guy is as likely to be as severely bullied over not owning an angle grinder as a woman over wearing the same clothes.

This example of male privilege is one that doesn't involve men so much as, say, the glass ceiling conversation does. Which I'd say means the respondent in that thread should have just butted out. But that doesn't make it straight up not an issue.