There is no such thing as science fiction, there is only science eventuality.
Greed is supported by an endless cast of what-ifs. Greedy people can never have enough to satisfy the need they feel in light of every conceivable eventuality.
To give yourself the best possible chance of playing to your potential, you must prepare for every eventuality. That means practice.
If I go into a relationship with an artist, which at most is going to last five years, we have a 100-page contract covering every eventuality. Whereas with marriage you go into it with no contract, with laws that date back hundreds of years, and I don't think that's right.