You missed my point. I don't disagree that as long as you're good at hammering, it doesn't matter if you learned it by hammering on the job or because you love

You missed my point. I don't disagree that as long as you're good at hammering, it doesn't matter if you learned it by hammering on the job or because you love hammering so much that you kept doing it by yourself. My point was that some people don't have hammering as a goal. Some people's goal is to make money, and some times that's best achieved by hammering, some times that's best achieved by sawing. But the people who hammer because they like it will try to hammer even when sawing would be more effective.