No, this is not wrong. You can't magically just "use it for something else". That's not how this works. You need to generate electricity where it is needed (or transport it, which costs money).

If there are landfills out there that are just spewing methane gas (20x worse than CO2, btw) into the atmosphere, why not make sure that is burned and used more efficiently? Please show me a realistic plan to do this. Bitcoin does it without forcing anyone and without taxes directed towards it.