Agreed. At the moment it uses huge amounts of energy.

But. There might be a not so small chance that that's going to change in the future.

The reward for blocks being mined gets halved every 4 years. Unless the price of bitcoin reliably doubles every 4 years as well, this reward will be worth less and less money in the real world.
So the incentive to spend huge amounts of energy could become smaller and smaller.
Which in turn would mean that less energy would be used in total to "mine" coins.