As shown by that example, whatever the downsides, America flooding the world with cheap subsidized corn and wheat has increased the food security worldwide.
I am certainly not saying that is 100% a good thing (farmers in the developing world have suffered for it) but it definitely is one of the reason for the increase of the food security worldwide.
While the average size of a farm is certainly increasing, and the number of farms is thus decreasing, ‘corporate farming’ isn’t really a thing.
Now, many farmers that I know contract with the Cargills of the world to purchase fertilizer and market their crops, but they (the farmers) are still farming the land. They are, in some cases, renting the land from a non-farming-landowner, and that’s the guy who’s getting the subsidy. Most farmers where I live rent on either a cash basis or a percentage of the profits, or some combination thereof.