If you wrote better and read more carefully you might be entitled to the respect that you seem to think you merit. Of course the book is not entitled to anything.
But to use your preferred meaning of a word to demonstrate how inapplicable it is to a very different usage is cheating and very bad logic. And what the hell does this mean, "The misuse of the word is very widespread and supposedly the meaning has now been officially changed"? For one, many do not agree with you. Merriam-Webster being among them. But most significantly, what does "supposedly" do in that sentence other than to suggest that you know stuff that your reader does not, so they ought listen-up and take heed of your wisdom? Worse, you follow it up with images of some Kastle-in-the-Kafka sky where decisions about our speech are made and vouchsafed to such as you.