It seems you don’t have any clue. Please research better. Many blind people were cured. You don’t have the right literature at hand and I am sorry for you.
Anyway you can prove yourself to be right if you cure yourself.
I will be pleased to know if that happens, and how you did it.
Regarding supervision I have seen people doing that, including myself, although results may vary and you can suffer lapses and relapses, but it can be done.
This said I don’t want to convince you Of anything but just wanted to know what was your experience.