This is an excellent point. I attended a medical school at a large state university which offered both a traditional lecture pathway and an independent study pathway. I chose the independent route. We were given a syllabus, told when the test was to be administered, and given the textbooks. At the end of the first 2 "book-learning" years of medical school, the average USMLE score for the independent study students was significantly higher than the lecture pathway (at least for our year group.) I believe this is because it forced us to figure out the best way we each needed to learn, not just be fed facts by the lecturer (which often go of tangentially off topic.)

Actually lactoferrin and lysozyme are not just proteins found in breast milk. They are a normal constituent of saliva, secreted mainly by the parotid glands, as part of the anti-bacterial nature of your saliva. Lactoferrin binds up iron, sequestering it from 'bad' bacteria. It's surprising that the article mentioned that they disappear after breastfeeding. Also the immunological benefits of breast milk are not just those two proteins. There are a host of others that contribute, such as secretory IgA among others.