That seems like more of a screening process than training process; each person has levels of math that they can learn using that method with various levels of effort. Using more effort does not develop any skill other than using effort to study textbooks.
It’s worse than that, even. What math textbooks you can pick up and get something out of is determined by your current math background, so it’s also a huge element of luck to get books that give you progress instead of discouragement.
I see it as more of a “maybe there is low-hanging fruit and you can teach yourself some math easily, but good luck picking topics you can tackle”
Learn math by getting textbooks and doing the exercises.
That seems like more of a screening process than training process; each person has levels of math that they can learn using that method with various levels of effort. Using more effort does not develop any skill other than using effort to study textbooks.
It’s worse than that, even. What math textbooks you can pick up and get something out of is determined by your current math background, so it’s also a huge element of luck to get books that give you progress instead of discouragement.
I see it as more of a “maybe there is low-hanging fruit and you can teach yourself some math easily, but good luck picking topics you can tackle”