“Wouldn't” is being used in the logical-conditional sense, not in the sense of willingness, requesting, nor opinion.
It's literally “What's the reason that the machinery of the brain doesn't use this mechanism, given this proof that the effect could in principle be used?”. A similar question can be made for quantum mechanical interference in the brain (which to be clear I feel is adequately answered by “the brain is a wildly inappropriate vehicle for harnessing interference effects).
“Wouldn't” is being used in the logical-conditional sense, not in the sense of willingness, requesting, nor opinion.
It's literally “What's the reason that the machinery of the brain doesn't use this mechanism, given this proof that the effect could in principle be used?”. A similar question can be made for quantum mechanical interference in the brain (which to be clear I feel is adequately answered by “the brain is a wildly inappropriate vehicle for harnessing interference effects).