Because stock bros be lazy AF. They can't even be bothered to buy and sell stock based off of who is and isn't doing well, so they utilize investment firms who offer safe and risky bets like ETFs and Futures respectively. Ultimately, everyone really just wants to buy one stock, have it make them money that exponentially makes even more money quarter after quarter forever, and then do whatever they'd actually do if money were no object (i.e. actually live life).

We don't live in a world where desire/need scales evenly with this desire for exponential, eternal growth. Therefore capitalists, who promise this impossible prospect to Wall Street, exploit human fears, desires, and needs however they can (union busting, lobbying, etc.) to keep growth up for as long as they can.

George Carlin probably put this concept best in what has to be one of the greatest bits of all time, on The Big Club. Although not directly related to this topic per se, it points to the truth of how this game between government politicians and capitalist corporate overlords is played. All the while, the majority of people, who are not in "The Big Club", are basically fucked.