>>The last time our economy did this, it created one of the worst financial disasters in living memory: the credit crunch of 2008.
That's a bit of a stretch. To vastly oversimplify, the 2008 crisis came out of easy credit pushed at people who couldn't afford it, those mortgages then being packaged into financial instruments that made it very difficult to see that they were linked, that a failure in one area could cascade.
I'd agree that the current AI technology, to use your expression is "a bit pants" - although I'd consider it more asymptotic progress than rubbish. But I fail to see how the financial market has packaged up the 'bets' so that a tech disappointment might cascade those into a crash.
You might be right; I'm very much not a finance guy.