There are always other barriers to making a change such as limited storage space, lack of time to cut food, budget constraints or teachers who find cookies and chips effective rewards in the classroom. Accept that these are barriers -- and work with the school to creatively find solutions.
My daughter doesn't think her diet is "special." To her, it's normal. She eats a wide variety of fruits and vegetables throughout the day. What message does it send to tell my daughter that to eat "healthy food," she needs to get her snack at the camp nurse every afternoon?
There's clearly a market of parents out there looking for companies to support them in their efforts to feed their children well -- and a growing resentment among these consumers toward companies that prey on their children with aggressive junk food marketing.