Eh, maybe. I wouldn't completely judge a workplace by these people. I've kind of come around to enjoy working with "weirdos" like this because their personal quirks have no actual affect on how they work. It can make them more interesting if anything.
I think the actual awful part of people like that are when they get in a position of power and preach their weirdness as The One True Way(tm). Which, unfortunately, a lot of them do. I think this stems from them having success in life without realizing it's selection bias. The result is that their own decisions are biased towards their quirks and they become pretty insufferable about it.
But, to your point and to completely contradict mine, I would bet those "One True Way" people probably are the norm at Palantir, judging by the onboarding book choices.