If you are the type of person that cannot tolerate repetition, piano is certainly not for you. Consider other forms of enrichment. Adults learn motor skills much slower than children do and sometimes require more determination to succeed. Without the repetition, a given piece can take months, sometimes years to learn, even then usually prepared to a mediocre standard. The lessons become tedious for both the teacher and student as there is little variety. The student has to learn to do this routine work independently. They have to learn how to practice. This is part of what I teach. Proper habits and approach to the instrument is critical and must be established from the onset.John's article might be worthwhile to show to parents of potential students in order to get parents on board in the teaching process, as @aferomckinney points out.
Practicing by John Graham
Previously on the Collaborative Piano Blog:
Build a Regular Practice Schedule Part 1
Build a Regular Practice Schedule Part 2
Goal Setting Part 1: Short Term Goals
Goal Setting Part 2: Medium Term Goals
Goal Setting Part 3: Long Term Goals