If I’m going to take time out of my busy adult life to better myself, I’m probably going to prefer materials prepared by an expert who cares. The scarce resour

If I’m going to take time out of my busy adult life to better myself, I’m probably going to prefer materials prepared by an expert who cares. The scarce resource here is not high quality learning material, but time and effort. Perhaps this idea has most value in new fields without established material.