Those who are doing, also teach, but are constrained in their audience and time with which they can disseminate their know-how by employment contracts.

This is a feature; not a bug given the way our quasi-free-market founded on protection of trade secrets over actual marketwide innovation that lifts everyone else.

I try guiding anyone who'll listen how to do things I'm well versed in; but there is only so much one can do in a day.