@icst @meeper a good point the problem is that would lock out a pretty lucrative market (US equities) to all but the select very rich (the SEC doesn't allow Americans under a million net worth excluding their residence invest in private equity whatsoever) even harder than it already does.
Pensions and investment monoliths Vanguard don't really care what a company does as long as big line goes up most of the time (Blackrock's flirting with ESG and other corporate hogwash disguised as "ethics" notwithstanding).
There's probably a better way to let people directly benefit from a company like Nvidia doing well without a stock market but I'm not smart enough to know a solution to that