> SpaceX has been engineered such that all kinds of passive investment funds (pension funds, ETFs) will buy into it

Pension funds are rarely passively run. They tend to be sophisticated investors. For example, several pension funds are already investors in SpaceX.

NASDAQ 100 will include SpaceX after a couple weeks. But it's a tech fund. It's strange to complain about buying the largest tech company in a tech fund. Similarly, S&P total market and Russell total market will buy early. But again, those are total-market funds. If you want to actively manage your portfolio, don't buy total-market funds.