The cryptography course in my bachelor's was good enough to paint a picture of the complexity involved. By then I had already heard the "don't roll your own cry

The cryptography course in my bachelor's was good enough to paint a picture of the complexity involved. By then I had already heard the "don't roll your own crypto" mantra, so maybe that primed me, but the semester course helped to get an appreciation for the subtle ways information leaks when you try to contain it. It also gave me some more confidence to push back if for example a colleague tried to convince me that the mantra doesn't apply to them/us. Obviously you can't mandate a high quality course into existence, but I definitely good value out of having it in the required curriculum.