That is a tough call. A.I. can be great tools and very helpful. A.I. can speed up research and supply helpful synopses of many subjects and help narrow down the bits and pieces you may be looking for. I think it is likely much more worthy of the computing power than some orange felon making immature pictures and videos with it, or the immature nonsense of portraying people naked. Everything gets abused because we live in a giant cesspool full of mouth breathers that do stupid shit.
The level of harm is directly related to the level of human jerks, and that means it can do a lot of harm. Hopefully, as the programming and learning gets better, we will be able to teach A.I. about things humans only feign to embrace, like integrity, honesty, sympathy...
We don't sacrifice using tools because people can use them for harm, we punish the people behind the issues they cause. A.I. can help keep track of, track down, and get these jerks off the streets. It would likely be fair, where the current systems simply protect the elite and play politics.
I'm all for a clean Internet where nobody can hide, no anonymity, everyone using it must show ID and proof of residence, and we shake out all of the evil players with zero places to hide. Just block the dark web and all connections that are not secure and be done with it. There is no need for privacy if people have nothing to hide and your data is secured.
As far as the power consumption, I don't think it actually adds up correctly, and I feel there is some other agenda to these giant power needs.
I also think A.I. will be doing a much better job of diagnosing illness, teaching, governing, and enforcement. Take the corruption out of the equation, take out the greed, the bias, and a ton of other human cesspool problems, and we will have a much better world to live in.
Since we can't seem to manage the world ourselves without destroying everything and causing so much suffering, I think it is time to let the machines help us.