The lady quoted in the article agrees with you but also seems to support why I thought of Kodály in the first place:

  > "Eleven years of piano lessons taught me something about playing the piano 
  > but almost nothing about music," she has said. "I was skating on the 
  > surface. If a child is shown a written crotchet they have no physical 
  > understanding what’s behind that. Kodály musicianship puts petrol in the 
  > tank in that it gives them a profound experience of music-making, through 
  > the voice, building up a repertoire of songs and giving them the 
  > unconscious knowledge of pitch-matching, walking the pulse, rhythm, 
  > phrasing and improvising – before making it conscious."

So you will not be touching the piano before all of this takes place and you will be learning the fundamentals and theory, even if in a playful way.