One passage made me a bit mad: "[...], but for now it is enough to observe that people who don’t know how to use a particular tool very well are being told to throw that tool away and learn to use an entirely new one on the grounds that it will enable them to do things that they could have done at least as well with the old one – which is (when you think about it) a little peculiar if the aim is really to help people…
I never finished high school. Went on to study a bit of nutrition. I work in my trade (metal fabrication) operating a laser cutter, doing a lot of 2D CAD work. I can rebuilt a car engine or build a house, including all electrical and plumbing and brickwork. I've built boats, sailed, dived, I ski, rock climb, occasionally draw a thing with a pencil. I can bash out a simple tune on a piano. I can pull a decent shot of coffee on a commercial grade espresso machine.
Please tell me which bit of your useless math I didn't do has limited me in anyway I care about?