I bet it could have been, but they wouldn't have been able to fill up the page or take direct quotes from the article and still justify ad revenue without plagiarism claim.
It doesn't surprise me though. I've had personal experience with MA holders taking 8 hours of mat-lab simulation time to find an answer for a problem I solved in 5 minutes on the back of a coffee receipt. It often comes down to understanding of numbers as objects/values vs concepts IMHO.
It comes down to something else, too. Publishers - maybe not all but most - pay by the word. So, the more words ..... My one pet peeve with many instructive books is their plethora of examples. They will make a simple statement and then recite example after example after .... on and on. Most of us would get it the first time. Don't need to hear four or five ongoing stories.
Anyway, when I run into that, I think "extra words = extra money + boredom.