We don't know exactly what the limits of AI improvement on our current infrastructure are, though. If the human brain is 20W, and a datacenter is 1GW, then maybe that datacenter can be 50 million times smarter than a human. If that's not already a risk to humankind I don't know what is.

Is the datacenter gonna grow legs?

Give me one datacenter, I'll keep it under control all by myself.

Now, if some dumbasses start hooking up their data centers to...I don't know, like--robot factories? That sounds like a risk to humankind.