When making decisions is taking into account opportunities that are not yet known. Because they are not known.
If you are positive and have some surface area stuff will come up (from the Harvard Study of Adult Development I remember reading that the number of 2nd degree connections is the best predictor of wealth) and there can be tremendous value in what comes up in some parts of your life (business, entrepreneurial). For people used to looking at a lot of options and seeing outcomes, investors mostly, call this “Optionality” as a shorthand.
In other parts of life, too high an awareness of optionality is probably adverse because it prevents settling down. Like dating or buying a house. It would be interesting how that choice is made by people how are familiar with the concept of optionality.