Just because its whole foods doesn't make it inherently nutritious.
Additionally -- just because I eat all of the ingredients in a MealSquare every day, that doesn't mean that I can be health ONLY eating those ingredients every day
While I agree that the data should not be lumped together, the treatment options for Colitis and Crohns are almost entirely the same, at least in terms of biologics, steroids, and NSAIDs. My doctor isn't 100% sure whether I have Crohns or Colitis (biopsies say colitis, but inflammation characteristic of crohns).
Secondly, I must say that I find diet is extremely important when you have IBD. Now, I'm not about to go off of all my medication and grab some Vitamin B tablets, but I, like most patients, have trigger foods that will almost certainly cause me pain.
Additionally, past studies have shown enteral feeding to be extremely effective (http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1378894/), suggesting that diet is a major factor. Again, fecal transplants are widely successful (http://journals.lww.com/jcge/Abstract/2003/07000/Treatment_o...) and the FDA is reviewing fecal transplants as a viable treatment option. Again, if fecal transplants do work, then a necessary cause of crohns/colitis could be an imbalance of gut bacteria, caused by poor diet/antibiotics/preservatives
Additionally -- just because I eat all of the ingredients in a MealSquare every day, that doesn't mean that I can be health ONLY eating those ingredients every day