>Because it’s a dangerous technology where profit over security can have severe consequences.
Yeah it's far better to have power plants kill a steady stream of people, but in a banal way that's hard to attribute, like coal power plants causing lung cancer.
No, but hydroelectric works pretty well. There's a reason they recycle aluminum, etc. (power-hungry industries—crypto-mining, ha ha) along the Columbia River, etc.
So build your data centers there. No reason to choose the least evil.
Hydro electric as a resource is probably mostly exploited - are there a lot of big hydro projects left to build? If there are they must be difficult or expensive or they would have already been built.