He explains some more numbers in the following paragraphs (that aren't needed to make my point), but the problem isn't even that AI can't make any money, it's that the scale of the money spent is so colossal, what they would need to do to actually make it back is insane! They'd need to actually replace most of the workers in the world because that is such a ridiculous, unimaginable amount of money! It outclasses all of their combined revenue significantly, and remember, these companies don't tell us how much money they make from AI (anymore), they bundle it in with other things, and if it was good, you know they'd be shouting it from the rooftops how much they were making.
I also don't take seriously any of his predictions that have dates attached to them - after all, the market can remain irrational longer than you can remain solvent. I don't trust his timing, but the numbers don't lie.
[1] https://www.wheresyoured.at/the-more-you-buy-the-more-you-lo...