Your link is just another Bitcoin maxi with awful logic. No, pumping money into pointless mining doesn't make a coin actually more valuable. It's just a waste. Out of all the real value crypto can bring - speed, trustlessness, decentralisation - mining isn't actually needed for any of it. It just forces things into a pyramid shape.
Here's a recent report on the environmental impact of PoS:
http://blockchain.cs.ucl.ac.uk/blockchain-energy-consumption...