I used to interact with Facebook via email. That didn’t last. But neither did my use of Facebook.

Back when Bitcoin was released, nobody was giving a thought to computer energy use.

It didn’t take long before people saw that energy was a major factor in cost of operations of the network.

It was a poor design decision

One that is fiercely defended by people who invested into the implementation. So it may not have started with it being anticipated, but not it is and people are actively choosing to perpetuate this use of energy.