That energy could have been used to produce more steaks, cars and heating. It might be careless but at least there is a logical reason for why these activities are highly energy intensive. Bitcoin is energy intensive for a fixed gain. It's like a war where people are fighting for a farm plot. The amount of food you can farm from that plot doesn't change just because you had a bigger war. Bitcoin will only process 7 transactions per second and every holder of Bitcoin is against changing that.