This is a regulation problem, not a datacentre problem.

In Aus, when anyone makes an application to connect to the electricity network, you get charged for ALL upstream upgrades to service your load. That might mean new powerlines, new substations upstream etc. That both shifts the load onto the DC operator AND moves them to areas where spare capacity is available.

Similar thing applies for a water connection.

Datacentres still technically drive up spot price for electricity but with the amount of new generation coming online that will even out over time. We're building DCs like crazy here and the average spot price is actually falling.