Playing piano is a complex activity, an athletic activity, really—akin to gymnastics, but more like ballet, where expression and communication with an audience is the purpose. People have learned to play piano all alone, but rarely has anyone done so without weaknesses that eventually limit or even injure them, and these have almost always been extremely gifted people growing up in a very musical environment. So having a teacher who can guide the development of skill and knowledge and wants to foster artistry and a love of music is a big help. 

That is my aim. Also, a teacher can provide opportunities to participate in musical events of both the performing and non-performing kinds.  My students have many opportunities available to them, both within my studio and through the music organizations I belong to: Cypress Creek Music Teachers Association, Texas Music Teachers Association and the National Piano Guild. 

Participating in such events helps greatly to expand the presence the piano and music have in a child’s life, and this is very good for making music a life-long love, whether or not they actually become a musician.