Many retirement accounts have limited options, leaving few passive index options. I sort of doubt many would offer qqq but not s&p, but it’s possible

Why was musk/spacex so interested in having the rules broken to include spacex stock? Do you think maybe there was a reason that involved musk benefitting??

I'm not sure why that's relevant. The original discussion was about who's forced to buy NDX 100 stocks like SpaceX. The answer to that is "index funds".

Asked and answered. Whatever cute point you're trying to make is rendered moot by real market dynamics and index inclusion rules.