In most any profession, there is a body of knowledge that drives decisions. Whether it’s medicine-based physiology or flight in physics, practitioners need to understand what’s happening to make appropriate decisions. It’s the same with learning. To be able to determine whether a planned intervention — training, e-learning or otherwise — is appropriate, one must understand learning.
This understanding isn’t simple. The claim has been made, fairly, that the most complex thing in the known universe is the human brain.