Why do you think that is some kind of contradiction? It is technology that is largely useless for legitimate projects, as other solutions are always better and less inefficient. And it is inefficient, because it does use 0.5% of the electricity of the entire planet, which is not something people imagine, it is very real. The only benefits it has are mainly useful for criminal purposes, thus it does help criminals.

All of this is consistent, factual, and a huge problem.