Marc Ribot (/ˈriːboʊ/;[1] born May 21, 1954) is an American guitarist and composer. (wikipedia)
Good is the director who lets you do what you have to do.
It's not surprising that a composer learns in detail an instrument. That's not surprising. That should be the first thing a composer does.
It's not like rock was invented by people who were trying to show their great muscularity and how perfect and strong they could be.