At first glance, it seems a bit presumptuous, but upon reflection, it's indeed a profound question: although data shows that most active investors underperform SPY in the long run, even some fund ETFs, many still enthusiastically pick stocks themselves. So I asked AI, and this is the answer AI gave me: the psychological need for a sense of control—people naturally want to take charge of their financial destiny, and active stock-picking provides a sense of satisfaction from "making decisions"; overconfidence—many investors believe they can identify undervalued stocks...