I think technical perfection is vastly over-rated. Not all photographs work when exposed, developed and printed as if Ansel Adams were the darkroom technician supervising their production. And photography would be unutterably boring if all photographs looked that way. Do I think photographers need to know technique and craftsmanship so that they can consciously choose what they're doing and can control their output? YES. Do they have to swear a life-long allegiance to the f64 School? No. Not everything in life is sharp, not everything is grainless, and not everything fits in the Zone IV-Zone VIII tonal range.