No, I don't think you are completely wasting the energy. I think the waste is disproportionately large in relation to other services providing some value to soc

No, I don't think you are completely wasting the energy. I think the waste is disproportionately large in relation to other services providing some value to society, including the ones by FAANG. I understand that you personally view Bitcoin as the first implementation, but the reality is that it is now the dominant one that is starting to exert non-negligible influence on the planet we are all living in. And it is not fixable, because it is one of the core features of Bitcoin. Good luck convincing people holding millions in Bitcoins to migrate to altcoins.