There are many people in the Facebook group who can speak firsthand of their success in applying knowledge that has been known to vision therapists for decades. Anyone interested in improving their own vision can quickly find out for themselves. This is not specific to any one person’s “method”. Or you can pay for a licensed professional from http://covd.org

Here is a different site which independently reached similar conclusions: https://gettingstronger.org/2016/03/faq-for-vision-improveme...

Edit: you are essentially asking for an explanation of behavioral opthalmology in an Internet comment. Any COVD professional will happily answer your questions for a fee. The Endmyopia site tries to communicate some of those principle in layman language, and it has required dozens or hundreds of blog posts and answers to reader questions. The link above provides a condensed explanation.

If wearing glasses works for someone, they are unlikely to seek out alternatives. The people who seek alternatives are motivated because glasses are not meeting their use cases, e.g. myopia has steadily worsened. That motivation then justifies their effort to learn the principles used by vision therapists, or the budget to pay a vision therapist for structured vision therapy that lasts months to years.