If I'm picking a stock to buy (in the "retail" market, it's primarily based on a balance of EPS, P/E ratio, and a low(er) amount of debt.

My P/E filter filters out the likes of Nvidia, Amazon, etc, whereas my debt filter ensures the smaller cap companies won't be swallowed by their debt like many businesses are.

Who knows if I'm smart or an idiot.

The same thing happens much lower down the ladder: when you ask customers if they care about most of the things managers (or engineers) think customers care about, they don't.