Their personal preferences don't matter that much. Even if these administrators are true believers in what they say and not just following the political winds,

Their personal preferences don't matter that much. Even if these administrators are true believers in what they say and not just following the political winds, they're only going to be appointed if it's politically expedient for someone with that stance to be in that position. So the political determiner is not that Linda Khan doesn't like Amazon, but the politically favourable thing for the Democratic party is to have someone poking big tech * . This makes sense too - it courts people on the economic left who see big tech driving inequality in tech cities, it courts people concerned with privacy, it even courts some folks on the moderate right who see big tech as an enemy because of censorship. * And it is just big tech - you don't see the same rhetoric in other industries at the moment. For example Disney's ownership of Marvel, lucasfilm, Pixar, 20thC Fox, HBO, ABC, ESPN is approaching monopolistic but nobody is proposing blocking new acquisitions let alone breaking it up.