The new wave of "X service on the web" companies are not tech companies, they are "X service" companies, whether that X is travel, music, laundry, home cleaning, etc. And since the problems they are solving are trivial and not remotely technologically challenging, they can afford to have this kind of arrogant culture that would never fly at a legitimate tech company where the difficulty of problems being solved forces at least some degree of humility on the problem-solver.