You eat field corn?
Some people eat field corn when it reaches the same stage as sweet corn. Put some sugar on it along with the butter and salt.
But, indirectly, if you eat commercially raised livestock, you’re eating field corn.
If you eat wildlife, that lived in corn country, you’re eating some field corn.
Would you be growing field corn if it wasn't reaping the benefits of the ethanol subsidy?
Not as far as I know. But, the fields could be used otherwise. The rise in corn prices since the US ethanol mandates is undeniable. And, it's also pretty clear to me that the production of ethanol from corn is at best energy neutral, or more likely, slightly energy negative.
By the way, I am aware that after ethanol fermentation, there is use for the remaining mash ss animal feed, so it's not a total loss.
Have you ever eaten anything like cornbread or with cornmeal as a coating as in fried fish? That is ground up field corn.