Eh anyone can Google to get to the next step, and the next step, until their hodgepodge project is complete (eg, most of my projects), but not many would take the time to learn how to best optimize the code, keeping in mind the low level fundamentals of the operating system. Those courses actually do provide a nice minimal level of understanding of concepts to ensure the programmer understands what they are doing to a level that can build larger projects, and hopefully work well with others on a team.