I don't know. I think some things can legitimately take some people ten years to learn, even if they are doing it right. However, my disagreement is that sometimes learning something at a cursory level, even if it doesn't allow you to do quality work, can be worthwhile. It can give you insight and appreciation of the discipline and help you work more effectively with the people that really do it. It can also be fun and make people feel proud to just be able to do it a little.