No, it's not. Regulations making building new power plants, especially renewables, and extra especially nuclear, in addition to making power lines difficult to build, are to blame. Yes, in an environment where power availability is ~fixed on short-to-medium time scales, adding a new large demand will increase prices.
But a fixed supply is a policy choice, and is not the fault of AI companies.
But a fixed supply is a policy choice, and is not the fault of AI companies.