I think "Python learners deserve to know about "site-packages" and (optionally) "dist-packages" " is a bit strong of a statement. I don't think the tutorial covers how to install third-party package which is what goes into site-packages, so I don't know what benefit they will garner from having that covered in the tutorial to teach the basics of Python. In an intermediate tutorial I can totally understand the explanation along with using e.g. pip, but for a tutorial like this I still think it's unnecessary.