If I invest in lighting money on fire, there is no money to circulate.

Paying my staff to light money on fire means that some of the money will circulate, and my brilliant idea to decarbonize the economy by replacing coal with printed currency will result in some benefits (much much less than the costs), but fundamentally it is not a productive endeavor.

The AI Data center build out is much more useful than purely lighting money on fire, but if we overpay for more than it is actually ultimately worth, than it still was a bad idea.