Doesn’t the fact that we rely on so many centralized services when pertaining to Ethereum render the whole “decentralized” concept useless?

So Ethereum or even Bitcoin is supposed to be decentralized, open-source, and "in control of your own data" but it seems like the vast majority of tools for them are completely centralized run by companies. And we are only becoming more reliant upon them. See Strike for Bitcoin or even things like Alchemy, OpenSea, Binance, AWS, or the APIs.

If the tools are centralized than what good does it do if the base is decentralized? OpenSea can just de-list your NFT or Alchemy can block access to certain dapps. Than why even use a decentralized blockchain if it's not actually "decentralized"

How do we resolve this?