That's why we are seeing these insane numbers. The competition is "do or die" right now.

Zuckerberg said in an interview last week he doesn't mind spending $100B on AI, because not investing carries more risk.

This only applies if you think one of two things; First, that it is guaranteed that this specific line of inquiry will lead to development of a form of superintelligence or otherwise broadly applicable development; or second, the form of machine learning technologies that unlocks or otherwise enables a market which would otherwise be inaccsesible that justifies this investment.

To date, no evidence of either even exists. See Zuckerbergs recent live demo of Facebooks Ray Bans technology, for example.