Remember: there are pianists and executioners. Become a pianist.
...Theodor Leschetitzky to Artur Schnabel:
"Artur, you will never become a pianist. You are a musician"
I understand you are thinking along similar lines, but please pardon my pedantic manner in this: I like to distinguish between a pianist and a musician ^^
I think a musician has a consummate soul who are engaged with the art. I think this is vital to realising in pianistry what myotherself has put in the earliest post. Music is a form of art, and throughout history all the art forms have had various influences upon each other. To learn, understand and engage with the other art forms is therefore paramount in any musician's life.
On the other hand, a pianist's engagement with the "art" is probably not much more than piano practise 8-12 hours a day...[thus in this sense, the pianist is not different to an "executioner"]