Using energy is not "maybe not bad", it is incredible. To compare it to smoking cigarettes is insanity. Look at how we are communicating now. Using energy has made the state of the world orders of magnitudes better for humans.
Discussion
I am not comparing energy consumption to smoking cigarettes. I was trying to make a point that you could argue that using something is not bad (or even good), but some of the effects can be quite harmful. Much like using energy. It has given us the amazing bitcoin, but not without it’s negative externalities.
What are the negative externalities of Bitcoins energy use which are not also present in every single other industry which uses energy