All acts of purposeful ignorance or negligence enrich others instead of yourself. All acts of learning empower you and those you care about. This is why you should learn to read more, be more crafty, and know how to fix your own car and bike. The sense of competence it comes with is like gold, and you will wonder why it took you so long to get it.
As a side note, learning how to fix my own bike is on my list of someday todos.