EVH is a classic "idiot savant" as are many rock greats.
(not a slam, look it up)
Being musically talented yet limited in terms of styles is not the same thing as being an "idiot savant," which refers to people who are extremely gifted in one area, yet incapable in various aspects of everyday life. Eddie seems to be a pretty normal human being, even though he evidently can't play over "Sounds of Silence." Maybe he was just trashed?EVH is a perfect example of an 'idiot savant".
Put him outside his comfort zone and he is beyond useless.