Let's say you have a book about a programming language; writing this in a way that anyone can follow – even those have never programmed before – would substanti

Let's say you have a book about a programming language; writing this in a way that anyone can follow – even those have never programmed before – would substantially increase the size of the book, as well as make it harder to follow for more experienced readers, since they will need to cut through all the stuff explaining the basics (loops, types, variables, etc.) in ways that a beginner can understand to get at the stuff they're actually interested in. Your approach works well for fairly short/simple concepts (although even in your article, there's a lot of assumed knowledge), but it gets harder the longer or more deep the content becomes. As for the posted article, I never had this problem. I suspect the author just bought badly written books; there are many of those, unfortunately.