At the same time, if you want to write a utility like grep that is agnostic to the structure of your text, it can exist and work. If UNIX cared about data structures, this wouldn't work.
Here's a good rule for you; if you find yourself thinking the way UNIX (or any other long existing and widely supported system) does something is dumb and you know better, assume you are wrong and look for the reasons that the people who are smarter than you chose to do it the way that it was done.
While there are some occasional good points that could be converted in to solutions, I can't help but think that this book is more amusement than actual constructive criticisms well packaged.
My point was that the parent's suggestion that anyone who criticizes Unix obviously isn't smart enough to understand it is just flat out wrong and offensive.
That wasn't what I was saying at all. But thanks for playing.