Productive mediocrity requires discipline of an ordinary kind. It is safe and threatens no one. Nothing will be changed by mediocrity; mediocrity is completely predictable. It doesn’t make the powerful and self-satisfied feel insecure. It doesn’t require freedom, because it doesn’t do anything unexpected.
Mediocrity is the opposite of what we call “genius.” Mediocrity gets perfectly mundane things done on time. But genius is uncontrolled and uncontrollable. You cannot produce a work of genius according to a schedule or an outline. As Leonardo knew, it happens through random insights resulting from unforeseen combinations. Genius is inherently outside the realm of known disciplines and linear career paths. Mediocrity does exactly what it’s told, like the docile factory workers envisioned by Frederick Winslow Taylor.