To me it seems that they're banking on it becoming indispensable. Right now I could go back to pre-AI and be a little disappointed but otherwise fine. I figure all of these AI companies are in a race to make themselves part of everyone's core workflow in life, like clothing or a smart phone, such that we don't have much of a choice as to whether we use it or not - it just IS.
That's what the investors are chasing, in my opinion.
It'll never be literally indispensible, because open models exist - either served by third-party providers, or even ran locally in a homelab setup. A nice thing that's arguably unique about the latter is that you can trade scale for latency - you get to run much larger models on the same hardware if they can chug on the answer overnight (with offload to fast SSD for bulk storage of parameters and activations) instead of just answering on the spot. Large providers don't want to do this, because keeping your query's activations around is just too expensive when scaled to many users.