That's a good point. I think the faculty role is often more one of continuity than maintained technical skills. My advisor does not really code anymore, nor does he work in the lab, nor does he remember all of the technical details. What he does know is why something is the way that it is because he was doing the work to develop it a decade ago. That's a valuable thing, but the extent to which that, along with grant writing and teaching skills, is highly overvalued relative to the worker's skills is rarely discussed.