You get a sense that you're working as part of a community towards a common goal : there's a kind of excitement to that.
Artist models, along with their constants and components, must be grounded in laws of nature that people drawing artists understand. Your pencil certainly knows how to draw simple pictures of people : just ask the pencil.
The aesthetic strategies do not keep many people awake at night, nor is it of immediate practical importance. Drawing human bodies makes you look smarter. Observational drawing is the keystone for successful drawing from life.
Draw with your eyes because you cannot draw with your pencil.
The standard model of human body figure drawings is found doomed to fail in several cases. Drawing simple pen and ink figures save the model.