Why should we devote large sums of money for renewable energy and data centers that serve to solve useless hash functions when we can instead just move to a pro

Why should we devote large sums of money for renewable energy and data centers that serve to solve useless hash functions when we can instead just move to a proof-of-stake based crypto and use the money/energy elsewhere. If people are able to see past there monetary gains from Bitcoin I am confident they would agree that while Bitcoin paved the way for mainstream cryptocurrency adoption it is highly-inefficient in a manner that is being easily solved by other cryptocurrencies