TradFi has a few wealthy individuals that control banking

You say PoS is an oligarchy, but it still offers anyone to participate in markets they previously were unable to. For example, providing liquidity and getting a cut of transaction fees - this is something TradFi has a monopoly on, but now everyday people can get a cut. You're right that people with more money will have a bigger cut - but it's still more equal than TradFi