How does Ethereum stay agnostic and censorship resistant?

I’ve been thinking about this question for a while especially after the recent drama in this space. How does/will the base layer of Ethereum stay agnostic and censorship resistant? What’s preventing miners and in the future validators from censoring txs from addresses that are “blacklisted” for whatever reason? I kinda understand this in PoW but I’m still learning about how PoS deters this and incentivizes staying agnostic and censorship resistant. Hoping some smart people here can help me understand better