The logical conclusion is that we don't have an AI bubble. We have a USD flood. Or consequentially, fiat floods. You see stupid expected valuation of OpenAI et al. not because investors are stupid. It's because there is a stupid amount of USD and it has to go somewhere. You either get real estate bubble or AI bubble or whatever bubble.
And when everything is a bubble then it’s simply that money has just less value overall. Remember asset inflation is not accounted into CPI, the money surplus/devaluation can take a long time to trickle down into the consumer economy.