> stable and affordable electricity and water supply

Look, I think you misspelled "demand" there. It's an understandable error; those keys are so close together.

Data centers present a demand on resources. A demand that wasn't there previously. You hook a DC up to the grid, and it will demand more electricity from existing generation capability. The DC proposals, without provision for their own generation, present extra demand.

So yeah, unless the supply of those resources can be commensurately increased in some way, the DCs will present extra demand on what we already have, and that means someone, somewhere, will have less available.