I understand how it works thanks, i'm looking for an explanation as to why this waste of energy is a good way to run a currency
Downvoted for snark that doesn't contribute to the discussion. I would like to see less of this on HN.
Well, it's the only way to run a trustless currency that has been tested at scale. I dislike energy waste as much as anyone else, but that's the current state of things. We will eventually move past this phase with PoS or something, but all the approaches are still in their infancy.