@InfraBlue,
You're right, I haven't given this much actual thought, seeing as I do that it's a trivial matter.
You are just nitpicking my analogies to avoid understanding them, and in an intellectually dishonest manner. So let me change track and address the core of your error.
A science (such as nutrition science, or astronomy, or chemistry) is but
a field of enquiry, a set of questions that people called "scientists" intend to explore through the use of reason and observation (aka "science"). Astronomy explores the question: "How can we explain and predict the movement of objects in the sky?" Nutrition explores the question: "What should we eat to be healthy?"
Now, if a science is a field of enquiry, it follows that a science cannot logically be a fraud, because a set of questions cannot be a fraud. What can possibly happen is that:
1)
certain questions are not scientific in the sense that no amount of reason and observation can resolve them. E.g. are the Beattles better artists than the Roling Stones? And thus, anyone claiming that this is a scientific question may be a fraud, or just mistaken.
2) certain responses to the question, or certain ways to collect answers that were considered fine at some point
may be abandonned later, as better theories or techniques become available. That's what happened when "alchemy" (basically the Arabic word for "chemistry") evolved into modern "chemistry": certain old procedures and theories were discarded. In this case, the discarded theories are not a fraud either, they are just superseeded by some other, better theory.
3) certain scientists are dishonest and go about responding the questions in a fraudulent manner. This is apparently what bugged you about nutrition.In this case,
these specific scientists are dishonest, not of course their field of enquiry, and not other scientists in their field either.
So at most you could conclude that certain nutritionists from Harvard were frauds, in that they were co-opted by industry and not impartial in their research. But you have no ground to consider the entire field of nutrition as a fraud (that would be logically absurd, since a mere field of enquiry cannot be fraudulent). And it is downright immoral of you to call honest nutritionists across the globe frauds just because you happen know of ONE nutritionist who was a fraud.
I trust that clarifies my position, better than a few metaphors could.