It provides more than one signal: a signal that you have obtained desireable knowledge and sensibilties from your education, and a signal that you can be relied

It provides more than one signal: a signal that you have obtained desireable knowledge and sensibilties from your education, and a signal that you can be relied on to complete something. The fact that the latter overshadows the former in a world where degree bearers are abundant is unsurprising and tells us precisey nothing we didn't already know.