the type of corn grown can be converted into other forms of calories like corn syrup that get used everywhere and are also used to feed livestock. Farm subsidies came about after the Dust Bowl so a single bad harvest doesn't ruin an otherwise capable farming operation
Also, as the transportation sector transitions to electric vehicles the demand for corn ethanol should drop off so if we need to produce more edible corn there should be excess capacity available.
Interesting. I never saw it as a food security program.
I saw it as a way to advantage corn at the expense of oil on the global commodities market because we had lots of corn but we were short oil (at the time). So the solution was to, in effect, turn our corn into oil.
You can see its effect in the price of corn in 2006, which jumped about 80% and never went back down.[1]
[1] https://www.macrotrends.net/2532/corn-prices-historical-char...