Ah, that's true. Though the majority of these are much closer to factory jobs (at least harder engineering degrees than CS) I think? Once it's built you need security, a couple systems engineers, some folks to move circuitry and cables, and custodial staff. There are perhaps a handful of cs grads employed by a data center as I understand it. (Most employees are managing hardware; they lean towards electrical engineering?)

The hardware only needs software designed for it once in order to offer compute as a service, and that design can happen far away from the data center (and, the CEOs believe, possibly by an AI).