I don't get the same feeling from other areas of study. Most physicists seem to agree on pretty much everything besides the super new, cutting edge discoveries. Same with engineers, chemists, etc.. But in nutrition it's the exact opposite. Google "is milk good for you" and you'll get equally convincing arguments for "yes" and "no". And that's the story for almost any nutrition based question.
It seems like the only option for a non-expert like myself is to just kind of wing it and try to eat vegetables and whole grain, and avoid things like sugar. But if there is one area in life that would be worth hyper-optimizing, I'd have to think it would be eating insanely healthy. It just doesn't seem feasible because I'll spend 10 years eating "healthy" only to discover that what I was eating is insanely bad for you.
Why is it so hard to figure out exactly what I should be eating? Especially since billions of us are doing it, and have been doing it for thousands of years.