I have to go with Pacman on this one.
Well to the best of my knowledge nobody said one needs to learn ONLY western music theory, but if your gonna play music based in western music theory it's a good idea to START WITH WESTERN MUSIC THEORY.
My point is this; say you're a businessman and you've got a meeting with the head of Sony. You spend a month preparing your presentation, buy a really nifty suit. You show up to the meeting and find the person you're meeting with only speaks Japanese, do you think your High School Spanish will help?
I know you want to a rebel and go against the "machine," but your point is nothing.
unfortunately the way most music education works is that they present you with a set of rules without justifying the reason behind it. like
Q: why are there twelve notes in the octave?
A: because when you add 12 5ths together, you reach the starting note.
which of course is not true, because no combination of pure fifths will get you back to that original pitch (nor will any combination of pure fifths give you a pure major/minor third). and anyone who wants to further their harmonic understanding of music later down the line has to effectively unlearn all these rules because they no longer apply.
in contrast, if we all started out learning a general harmonic theory, we could apply it to any kind of music, with full understanding of how that music works. so no, contrary to popular belief i believe it's a very bad idea to start out a musical education with a specific set of 'rules' in mind, particularly when a student is lacking in knowledge or is too young to understand those rules.

