I agree. The information must be as objective as possible. A table containing nutritional values is objective. If we want to compare different foods, you need to work from a baseline.
I was reading a recent article that said that, when you give people time to understand labels and to do the math, they are generally able to do so fairly easily and to distinguish between different kinds of foods. But people do not always have the time to do that when they are buying their groceries. They make their choices based on habit. So just because the information is available, it does not mean that people will actually read it, or that they will use or interpret it correctly.