He gets some correct and also is drawing conclusions before absorbing the whole story to be objective.
There are a ton of unintended consequences throughout the history of government farm policy. If tariffs and abandonment of ethanol as a gasoline additive happened to today's markets there would be a very painful crash for corn, soybeans, and wheat producing states. It would make the 80s seem tame. Doubtful there is a soft landing that could be engineered over anything shorter than a 10 to 15 year time frame.
Modern farming from the seed corn companies to the logistics systems in place for grain delivery worldwide is incredibly efficient.