I look at your suggestion for peanut butter and jelly and I think about Mrs. Obama's contention that school lunches are not healthy. Personally, I think her concern is rooted in the fact that most of the people from the inner city know literally nothing about how to prepare food for their children. They have been so dependent on government food for so long that they wouldn't know how to prepare healthy food if their lives depended on it.
The very idea that there are parents who are more than capable of preparing healthy food for their children is totally foreign to her.