The technology obviously has merrits. When the bubble pops LLMs won't go away, just like the dotcom crash didn't spell the end of the internet.

The issue isn't that there aren't good business models or value creation, it's that anything related to AI currently has valuations that are unsustainably high given the current limits of the technology. That leads to economic activity that just couldn't exist without those valuations. And once the hype cools down the valuations will go closer to reality, leaving a lot of companies unviable, and many more will have to severely cut back spending to remain viable.

Or maybe the entire AI market pulls a Tesla and just stays at valuations that aren't justified by normal market fundamentals. Or maybe the technology adapts fast enough to keep up with the hype and can actually deliver on everything that's promised. This doesn't have to come down, it's just very likely that it will.