It's generally agreed that index funds are going to eventually destroy the stock market because they are the free market reinvention of a central planning economy relying on fee riding on the valuation work of a shrinking number of active investors, but that's a different problem.
I'm not saying the buyer's do. The selection criteria of the index fund may include it.
> It's generally agreed that index funds are going to eventually destroy the stock market
Or, like I've been saying, companies will find says to adjust their figures to get selected for index funds. And then eventually implode, due to the cost of doing so, which in most cases is quite a lot, taking down the investors along with them.
By whom? Money managers? But of course!
Guess what - if you think index funds are not optimal, deploy your own optimal strategy then profit bigly.