Personally it seems to be a cultural norm inhereited from the infamous tough interview question gauntlet technique. It also perhaps coincidentally seems to be

Personally it seems to be a cultural norm inhereited from the infamous tough interview question gauntlet technique. It also perhaps coincidentally seems to be a "closer to the autistic spectrum" norm propagating for good given in my experience and general observations silence to think is preferred over noise-filling blather in already potentially straining conversations. It is consistent with other stereotypical West Coast "tech power moves" of telling the prevalent useless traditions to get lost. Like dressing down instead of the three piece suits of executives. They may see it as an assertion of dominance because it goes against "their rules" and going along with the tradition of "I am too important for the rules on peons" but it is more a side effect of "nobody is making me bother with this bullshit so I won't bother with it for anyone".