This author is naive about ethanol.

Corn ethanol does not take away dinner, in fact it enhances it over leaving the corn alone.

Corn ethanol uses a waste stream from cattle feed production.  It is a value added product.

Cattle can not digest corn starch/carbohydrates very well and a lot pass through the animal undigested in the manure, even taking other nutrients with them.  In other words, they are wasted.

Corn ethanol uses only the carbohydrates and leaves the cattle feed(the proteins, fats, and minerals) alone, actually enhances them to be more digestible, more concentrated, more productive, and healthier for the animal over feeding the corn straight.

Using a waste stream is the greatest thing.

Corn stover cellulosic ethanol is touted as using a waste stream but it is not, stover is normally left on the soil to feed soil microbes who hold on to nutrients in the soil and build organic matter.  Removing it hurts soil health.

Ethanol is best when true waste streams are used.