I don't think you can rest your entire argument by citing one example, especially if that example happens to be one of the most exceptional mandolin players working today. I could just as easily cite Sam Bush as "the exception that proves the rule". Sam is a unique player, and as amazing as he may be, trying to adopt his specific techniques would probably hinder the development of a young player.
This is the same argument that you hear in flatpicking circles regarding Doc Watson. You'll most often hear that while he's an amazing picker, you wouldn't want a beginner trying to copy his technique. He, like Sam, is the rare player who can overcome the obstacles posed by less than optimal technique to become a great player. They're exceptional anyway, and would probably thrive no matter how they approached the instrument. For your average player, poor technique will eventually become a limiting factor in their development, and can (and should) be easily avoided.
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