"Clothing is a basic human need, whereas data centres or AI are, well, not."

If this was an actual problem, clothing prices would go up and clothing and cotton producers would outspend the AI companies if that's where the demand was. You are anticipating a problem that doesn't exist that the market is the best tool to solve once it were to arise. Prices are a fabulous feedback mechanism. The absence of prices as signals is what made planned economies fail and this was one of the main issues in the Socialist Calculation Debate. Don't try to guess what people want or need! As long as there is no market failure (no competition, natural monopoly, etc), price signals will lead to proper resource allocation.