When you're in the business of selling shovels it benefits you and your investors when you convince folks that there's a gold rush they're missing out on... and need your shovels to get in on it.
There are quite a few engineers who aren't convinced. They seem to recognize the benefits and the limits of the technology. And they can see how it's failing in practice due to the technical limitations: energy demand and supply, heating and cooling, economic limitations, etc.
What's interesting about these two CEOs is one is definitely interested in selling shovels, the other is interested in selling contracting services that must lease the shovels.
I think you're right though, Meta has real challenges ahead of them in terms of capacity and creating an actual product that can be monetized for the general public. It's worth mentioning that FB was doing AI long before the hype train started really rolling, and monetized it -- all behind the scenes.
There are quite a few engineers who aren't convinced. They seem to recognize the benefits and the limits of the technology. And they can see how it's failing in practice due to the technical limitations: energy demand and supply, heating and cooling, economic limitations, etc.