Thinking about that quote, it sounds nonsensical
At the outset, all businesses seek to grow faster than the average/stock market. Five years later, half will do better than average, and half will do worse than average.
Saying that the half that did worse should have instead invested into the market, five years ago, is kind of meaningless.
In my experience, LLMs aren’t really that good at summarizing
It’s more like they can “rewrite more concisely” which is a bit different