Here is MACA’s argument in a nutshell (paraphrased, of course):
Mrs. Obama is to be congratulated for recognizing the importance of agriculture by having a garden planted.
MACA has a network of “ambassadors” whose mission is to educate Americans (especially the children) about the importance of farmers and ranchers to our daily lives.
Agriculture is the largest industry in America, employing 22 million people in farm-related jobs at all levels.
The technological advances of the past century have enabled farmers to be much more productive, freeing the rest of us to go invent things and do research, etc.
We Americans who are struggling at jobs, raising kids, and taking care of aging parents shouldn’t have to worry about tending a garden.
Storage and preparation is to blame when food is “considered not wholesome or tasty,” not how the food was grown, and “conventional” agricultural methods produces food that is wholesome, tastes good, and is more economical.