alt Hacker NewsHow does your first premise follow from the second? Yes, you're not bullish on these companies specifically, but you're effectively giving them (and some others) your money and inflating their valuations. You're bullish on the status quo and they're a large part of the status quo.
In fact, it's arguably worse than deliberately investing in them, because you're completely indifferent to the soundness of their business model. The hope is just that through the magic of "efficient markets", someone else will arbitrage your errors away. I don't know if there are enough takers for a bet of this size.
Being completely indifferent to the soundness of a publicly traded company's business model is the correct choice for most ordinary people trying to invest their retirement savings, because they have no basis for thinking any other choice of how to invest will result in superior returns. This is the entire line of thinking behind all passive index-fund-based stock investing.