Using that logic, Daniel Snyder should be a great owner too.
The ability to make loads of money doesn't equal football knowledge anymore than it means you know how to ride a horse or drive a tank.
Yes, as the owner of the team he can make it his personal plaything if he wants to. That is, if he's okay with the product on the field being dog sh-t.
If he actually wants it to be good, then he should hand it over to the people who know what they're doing.