(I'm assuming that you picked Barbara's for the 'lucky to sell at a garage sale' award, and the Craftsman's for the the store, since that's where I was trying to go with this story.)
It's obvious that in addition to knowing how to use tools, and knowing what a good outcome looks like, you have to actually have experience with the process of building furniture to get a quality outcome. What do you think the outcome would have been if the Craftsman would have worked with Barbara to create the furniture. I suspect the outcome would have been of a much higher quality.
How many people have you seen promoted to a management position, sent to a week-long seminar on management and left to fend for themselves for some 'probationary' period of time without any other guidance. They have the tools, they know what the outcome should look like, but they still don't perform to expectations. What if they had a mentor to guide them, wouldn't the outcome be better?
Problem Solved: Developing Leaders