It would be a great thing for the economy. So many sectors are underinvested right now because capital has been stowed away into these companies valuations. Imagine 6T dumped in any other industry and it would be a generational step change event. For reference that's ballpark like 3x the valuation of the entire American biotechnology industry, all in one company. Talk about opportunity cost.
There's not really $6T stowed away in one company. That's not how market caps work
Company valuations aren't a sum of the cash flows invested into a company or the available cash flows out of liquidating it either. These aren't uncorrelated numbers but you can technically get a six trillion dollar "valuation" from one person paying $1 for a sixth of a trillionth of a company.
Does it work like that though? I agree that AI may be crowding out other industries, but I'm not sure you can just take apart a company and redistribute that money elsewhere.
Investment isn't the issue it's talent.
Jensen provided a platform and roadmap to help advance AI. His selflessness and leadership attracts talent.
Money might help pull talent away but it's silly to think money taken away from Nvidia will suddenly be reinvested into other pursuits.
If you don't think talent is an issue, why hasn't anyone begun seriously competing with SpaceX, TSMC, ASML?