Is anyone else surprised there isn't more discussion of focus? I know many people (myself included) who work hard but on too many things simultaneously and the

Is anyone else surprised there isn't more discussion of focus? I know many people (myself included) who work hard but on too many things simultaneously and the results aren't as good as folks who seem to just keep plodding along on one thing. Two of my friends who are extremely successful seem less interested in the field they are in, and while intelligent not outrageously so, and don't work super hard. But they just keep at one thing without distraction. Over 10-15 years it's added up. And it's not an easy thing to do. Sticking at one thing 50 hours a week for 10 years is intolerably boring for many people.