Sure, it'll only be ~2% of the index if it opens where they want to. But in the downside case where it meanders long enough for significant amounts of its stock to make it in to public hands and then goes to 10x revenue (i.e. down 90%) , you've allowed a company to engineer dramatic changes in index rules resulting in a transfer ~1% of S&P 500 market cap from index funder holders to its bagholders^W privileged insiders^W^W investors.
Yes a -1% day should be nothing to a long term holder. Yes they're buying the market; if the market is wrong they shouldn't really have any recourse. But one can also understand that a -1% day that accrues ~entirely to the benefit a small group, who appear to have engineered that outcome has much more emotional valence than a typical down down. It doesn't feel like a bad day on the market, it feels like a heist.
Yes a -1% day should be nothing to a long term holder. Yes they're buying the market; if the market is wrong they shouldn't really have any recourse. But one can also understand that a -1% day that accrues ~entirely to the benefit a small group, who appear to have engineered that outcome has much more emotional valence than a typical down down. It doesn't feel like a bad day on the market, it feels like a heist.