The key point from that quote is "when people are fearful, a pessimistic future is currently priced in" and "when people are greedy, an optimistic future is currently priced in."
So, effectively, it's setting up a win/tie dynamic on change/expected. Vs a lose/tie dynamic on change/expected when investing with the current sentiment.
So, effectively, it's setting up a win/tie dynamic on change/expected. Vs a lose/tie dynamic on change/expected when investing with the current sentiment.