I am glad someone out there brought this up, and explained it very well. When I was younger I was always intimidated by people who could put on the facade that they were born able to play anything they wanted by some miracle and blessing that no one but them had and they must be worshiped. Hoey! Every one must crawl before walking no exceptions, I found out later that these people practiced the same stuff over and over for years, and when they said they were playing something from ear on the spot it was from memory and they were fooling musicaly illiterate people to inflate their egos, I know because I tested them on it; I would play a simple jazz progression and say " well then play this,...I very rarely met someone who could,..unless they were humble read music studied properly and were honest. People who play just with their ears must tear the hell out of their ear lobes, I encourage my students to strum with a pick.