An artist who is committed to self improvement can not live on the road for there is no time to practice or develop new techniques or refine old ones. There is no time to compose new works with any real depth.
The artist who never teaches, or worse, who teaches without having lived for many years within the other two aspects of his or her musical personality, is truly the most detrimental to the art form of music.
All improvisors, composers, performers, and recording artists teach for they are permanent students, always learning and therefore always eager to share what they have learned.
The great nineteenth-century composer Frederic Chopin was known for his incredible pianistic skills yet he preferred teaching and composing to performing.
As one who knows first hand the joys of steady gigs, touring, and playing every night of the week for years I can honestly state that in this notion of artistic fulfillment Chopin and I are in complete agreement.