In reality PoS can be flawed and I think that the flaw is being exploited especially by those who can actually make powerful connections with the whales. In reality, we can go PoW but then the network will still be open for exploitation by those who don't care about having skin in the game. This way, the network will suffer big time.
In reality, Hive needs skin in the game, but then people with skin can completely shut out those who might genuinely care about the ecosystem but don't have enough skin to prove this.