They're not being built, and you know they're not because of exactly these kind of figures. They'd need multiple additional power stations to feed them. The kinds of places that cost governments tens of billions.
Then all that energy needs to go somewhere so you probably need to add 25% more to power a cooling system. Something that can dissipate that atom bomb of energy into the environment every hour.
Without the support infrastructure the compute is useless, and nobody is talking about the infrastructure because it's impossible.