Also, fundamentally the problem people seem to have with tech giants isn't actually the concentration of power, it's that they're not using that power in precis

Also, fundamentally the problem people seem to have with tech giants isn't actually the concentration of power, it's that they're not using that power in precisely the way the people who're complaining want. For example, the complaints about "Russian interference" are a demand to exercise that centralised power. As another example, the activists who've been demanding Twitter crack down on doxxing and harassment are currently organising a 24-hour boycott of the site because it didn't let a celebrity post someone's private number and get her followers to harass them, because what they really meant is that the site should ban other people who they detest, that it should use its power to silence their enemies.