Most courses have required and recommended reading lists.
Do people really read the recommended materials? Why are they recommended?
These readings benefit students who desire to learn more about a particular subject.
What about our leadership? Is it required or recommended? Do others follow because it is required?
If others follow as a recommendation, then they follow because they desire to go deeper and learn, and they follow because of the additional benefit provided.
Perhaps it is more accurate to say that leadership should be required and following is recommended. Interesting thought!