I know some famous people who didn’t know how to make a call, but that’s not my point.
The goal is to maximize the gain. When Buffett had only a million dollars, if he was promised to make a million dollars in a month by learning how to use a PC, he would do that. Now as a billionaire, it might not be a smart thing to do. Which Buffett would you like to imitate? It all depends on where you are now.