Not to mention the investment is on another level. We've got companies with valuations in the hundred-billions talking about raising trillions to buy all of the computers in the world, before establishing whether they can even turn a profit, nevermind upend the economy.
the investments are being made by massively profitable companies (our biggest and brightest ones, the ones that have been carrying the economy for quite some time now, even before "AI"). even just in recent history we have seen companies making large investments and being very unprofitable until they weren't anymore (e.g. Uber). and it is always the same story, everyone is up in arms "this is not sustainable etc..."
whether or not these companies can turn a profit - time will tell. but I am betting that our massively profitable companies (which are biggest spenders of course) perhaps know what they are doing and just maybe they should get the benefit of the doubt until they are proven wrong. but if I had to make a wager and on one side I have google, microsoft, amazon, meta... and on the other side I have bunch of AI bubble people with a bunch of time to predict a "crash" I'd put my money on the former...
I wonder how many actually beneficial projects will not be financed by investors too scared to try anything risky after the AI buble crashes and burns to the ground. :P