They do buy and own all the things.

Nothing is stopping them. They're doing that by being participants with plenty of dividends from their Vanguard, Blackrock, Blackstone, etc... type of private funding groups.

It's just about the appearance of being different entities, but they're the same.

They need to appear not to be the same so plebs like us can believe their fake incentives of "maybe one day we can achieve their level of 'greatness' with lots of hard work" and keep our heads down and not fight them when we learn "They're all in one big club and we're not part of it."