Well, I have to disagree with that view. That's my right, I believe.
Technique is not a pure mechanical matter, but it involves your mind. You need to know what you're doing, or you might not get the right results. Like Hanon, I think it's an excellent book, if you practice it thoughtfully. If you just leave your fingers, they'll go crazy, and you can harm yourself. But you need to be concentrated, listening to the sound you make, getting it more even, feel the relaxation, and so forth.
I think the progress is made quicker with active participation of the mind in the practice process.