…are doomed to be forever bad.
Unless they drop their dozens of lines of theory, of course.
Theory isn't useful, as soon as you start consulting what you learned it does more harm than good.
The state of brain needed to perform and consult learning are totally different.
No amount of theory or practice, with the inclusion of exaggerated examples like tens of thousands of hours of comprehensive and very seriously studied repertoires complete with optimal sleep, nutrition and a happy state of mind + the enjoyment of doing just that, can out weigh just playing chess with the wrong mindset.
You bite the apple and you're worse for it. It's something to unlearn + recondition. Kind of like how when old people get vascular / heart diseases, you can try to improve the symptoms but there's no cure.
The same reason we tell peeps not to drink alcohol or smoke tobacco
It might take a little longer to recover, but you will if you drop your 20 lines of theory. It’s similar, but not the exact same to tobacco and alcohol.
you know anyone can do math with the help of a calculator.