That, I'm sure, is a grossly unfair characterization of Iowan food.
It's a quote from an Esquire article on Rep. Devin Nunes, and his family's dairy farm in Iowa (not California where it used to be). The dairy farms in the county are paranoid about the possibility of ICE raids because apparently most of their labor consists of undocumented immigrants. On a dairy farm, the cows have got to be milked every day, either twice a day or in some cases three times a day. When you have 2,000 cows there's no way to handle the sudden jailing of 10 or 15 employees for even a day. You have a lot of very unhappy cows (should PETA lobby against ICE raids on dairies) and a hit to production. When a mammal's milk remains in the mammary gland, it's a signal to the body the milk's no longer required; start to switch energy to body building.
The quote comes from a person in town, commenting on the significant presence of Latinos now living there.