Which is a valid point, because PoW ensures that there is no restrictions on who can come and become part of the network. Which is why Doge Protocol PoS scheme is hybrid. In the immediate mainnet release, it will be purely proof-of-stake.
However with the future hybrid mode, PoW block winners will get a validation stake; its a bit complicated to explain in this short comment but will be explained in detail in the consensus paper coming up Nov 2021.
But we need to wait for PoW to run primarily on green and affordable energy, before the blockchain switches to Hybrid mode.
In my opinion, proof of work presupposes the fairest and fairest distribution of coins. Everyone can start mining and earn coins.
In the case of a POS, coins have to be purchased first, which limits many participants.