The problem is that farmers have been taught to ignore the health of soil organisms and just apply a short-term bandaid chemical (vs biological) spray product, which causes more harm in the long-term. Take a wild guess who taught them that?
Ultimately, this might be a simple story of "better soil outcompetes lower quality soil." Stop the presses! :) But I don't see how one exceptional case invalidates the use of soil biology to break down in-situ minerals.
I haven't evaluated their property, but they may benefit from relatively inexpensive glacial rock dust amendment. Sounds like their system could be rate-limited in the rock weathering step, not the biological activity.