What makes for a great hacker?
In both programming and paining, there are people who are amazingly talented and can produce great work, as long as they know exactly what to do. As soon as you ask those people to come up with something on their own, they get lost.
The best programmers are the ones that can do both both, have ideas and translate their ideas into code.
When given the choice, PG would pick the ones who know what to paint, even if they can't hold the brush, so to speak.