Let me simplify this:

Joe Consumer decides to eat healthier. He heard veggies/salads are better than fried food. He goes to McD where he is served the same fried food, only now over wilted lettuce instead of stale bread. Joe Consumer thinks he made a good choice, and McD is working hard on preventing him from finding out otherwise.

Now, you will likely object to this, asserting that Joe should put more effort into researching his diet. I disagree - general public has no choice but to trust experts, especially if limited to average-bear intellect. We choose to trust doctors, engineers, teachers, dieticians, car mechanics... because for overwhelming majority alternative is not possible.

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