Your farming example is ludicrous. We need hay as much as we need sorghum. We can't have every farmer planting only one set of crops based how they expect the weather to be. First, it would absolutely crash the market for that crop when the harvest came in, and second there would be none of the other crops that are necessary.
Not only that but you have to rotate what is planted in fields or you'll basically decimate the fields productivity.
The guy putting in hay just got unlucky this year. I grew up on a farm, this isn't unheard of. Also sorghum doesn't grow well in all areas, where I lived corn and barely/wheat/rye were the best crops. Sorghum grew, just not all that great due to growing season. We never ever planted the same field twice in a row with the same crop. Some years we left it fallow (nothing planted) to give it and the microorganisms a rest.
I think the parent poster lacks some fundamental knowledge of crops with his analogy.
