Probably it's not against shuhari. Shihari is often used to describe professional principles in martial arts or playing instruments. It assumes they're trained to the point where if they do it, they unconsciously follow all the rules. When they play guitar, their fingers just move in the most effective ways and play the most satisfying melody. Then they intentionally break a few rules to improve it.

So shuhari is ”first do it, then do it right, then do it better” for professionals.