I'm not in a position to judge, rejecting the starting point, but have a listen and see for yourself:
That's a distinction that I think everyone understands but it hasn't been asserted very much. Piano isn't difficult because it's an especially difficult instrument to play, it's difficult because composers have kept pushing pianists' abilities until it has become as difficult as they choose to make it.Look up "jazz recorder" on YouTube. The speed of those fingers on the holes, and the finger-tonguing coordination that must be there... wow. Any instrument can be made difficult, depending on what you play on it.
Whatever the case, I think we can all agree that the piano is the most beautiful instrument.