Back when I lived a different sort of life surrounded by wealthy Westerners with live in "maids" who were any combination of cleaners or nannies or cooks or all three, I didn't like it when people said "My maid is really annoying." "My maid has such a funny way of doing X." or "My maid is so lovely."
These women were all Filipina and it reeked of colonialism, privilege and reducing the identity of these women to the point of eradication. And it also reflected how they were treated - not directly abusively in these houses, but definitely without regard to the dire life circumstances the woman cooking for their children found herself in in order to provide money for her mother to cook for her own children back home.
I can see where this guy is coming from but he's just got too much time on his hands. (I'm assuming he identifies as male MNHQ). He's taking something and just distorting it out of all sense.
If PhD students are treated with zero respect then he may have a point, but that's not what I've seen (not that academia treats many people well).