Both very true statements, however, I think the point is that the information for, especially the Extra test, would be contained in multiple college courses. That content is very broad, and is difficult to train if we went very deep in any of these areas. For example, there's only a couple questions on a Smith chart, however, to truly understand a Smith chart, would take the equivalent of a couple college courses to derive how they function. However, to learn how to read one for uses in Amateur Radio would only require the information in those couple of questions. What I've seen over the 30+ years is that people take the test to 'get in the door', and THEN they dive deeper into the areas that excite them. This hobby is SOOO broad that I still learn lots from even the newest of hams that have tackled a topic that I haven't. So much to do, so little time.