Hi, this is the author.
Yes, I agree it would be wonderful if everyone who wanted to program could go to college and learn all this stuff as they worked their way to their CS degree. It would also be wonderful if the texts you mentioned were understandable for those people who don't already have CS degrees.
The idea here is to get people to a point where they can poke around a bit and discover things on their own. I am a firm believer that the best way to learn how to do almost anything on your computer is to read/be told/whatever the basics, and then explore and learn the more advanced things as you go. It's not holistic, but then what is, really?
If these tutorials don't help you, that's fine; don't read them. But from the other comments here I hope you can acknowledge that many other people have been looking for just such an approach, and that's why this tutorial is a good idea; people want it. If you're not one of those people, that's fine, but that doesn't mean that no one wants it. (Don't fall into the common CompSci trap of believing that everyone's needs and wants are yours).