Quite contrary to PoS, PoW is very hard or almost impossible to compromise. Not so for PoS, where more attack vectors can be found.
For example, PoS can be abused by rich stakers. Many PoS projects have a so-called pre-mining of coins allocated to the team and the team can abuse such pre-mined coins to gain influence about project decisions.
Based on a lot of different quantities out there bitcoin is quite unique ranging from its proof of work mechanism to decentralization. One thing I've come to understand is the fact that no matter how important and efficient decentralization is over centralization centralization will still exist and you just can't defy the fact that altcoins are there will continue to be created under a centralized system.
Let's weigh the odds in fact, what other cryptocurrency aside from bitcoin and probably monero was created without a primary drive to make profit off investors?
We can never come to the stage where centralization is completely outlived, centralization will continue to exist because whether we believe it or not, like or not, centralization is plays some very important role in ensuring security on our system and society, centralization still plays some important role in cutting out expenses in crypto, by helping us spend less in fees, like when we send funds like bitcoin to one another through centralized exchanges, it's completely free and very fast compared to when we are sending bitcoin to another person through the blockchain network.
Decentralization and centralization are both like cryptocurrencies and fiat money, both will co-exist for a very long time, and by this, I mean for generations to come.