Jason, we might indeed have differing opinions on diet and nutrition and it's OK by me that you don't believe in the fiber theory.
In my opinion the fiber link to health has been proven as a pretty well airtight case, as you'll see when you research it.
One of the most salient points is that soluble fiber (high-inulin vegetable broth) has been used for 5,000 years in China and 2,000 in Greece specifically for bowel disorders.
The second point is that bowel dysbiosis is known to promote toxin generation, and this is a primary cancer cause, particularly but not limited to bowel cancer (keywords: inulin aberrant crypt foci). When inulin is added to the diet, aberrant crypt foci (cancer starts) are reduced.
I think this is a big deal for a lot of people considering the epidemic of bowel dysbiosis and colon cancer.
There's more; I've compiled about a week's worth of steep learning curve on the subject, into the references here:
http://tinyurl.com/3nxva
You asked for an opinion. I have dealt with almost 2,000 cases of bowel disorders in the last 6 years with inulin, undenatured whey and selenium, and a smattering of other suplements, without side effects. The key complaints besides dysbiosis and candidiasis that were relieved were brain fog, lack of mental focus, depression, lethargy, insomnia, anxiety, skewed immune response, leaky gut syndrome; all these result from toxin load, and the malabsorption due to that load is not inconsequential. Part of my treatment then directly addresses toxin load, part of the "cleaning up" you asked about, with an antioxidant regime and for that matter, liver flushes.
Low antioxidants have been identified in other research as causative of the oxidative stress condition that so dramatically affects health and shortens life span. Not only do you need the cod-liver oil, you need the antioxidants that you'd normally get in vegetables, fruit, and supplements. (keywords: oxidative stress antioxidants glutathione)
Antioxidants all work together, and glutathione is the primary support for detoxification, which addresses your question from another perspective.
I recognize there are several approaches to diet, many of which are modeled after various primal diets. I think this high-fiber high-antioxidant approach more correctly reflects our biology AND our symbiosis with probiotic gut bacteria that the low-fiber diets fail to address.
Neither my approach nor yours suggests we can or should eat high-carb foods at all; what varies is the amount of fiber and antioxidant support. But people want a degree of latitude in their diets and this approach allows it
By the way with regard to your probiotic, it's been shown that probiotics you eat do not work beyond the few hours they are in the gut, so you have to take them forever. This is not really a sustainable or natural dietary practice but a stopgap measure, and it arises because if the probiotics aren't fed, and fiber (and some natural carbs) is what they eat, they can't replicate and compete on the bowel wall. This is crucially important for nutrient absorption, bowel acidity, and short chain fatty acid production the bowel cells rely on, and not doing it, while still eating carbs, is the reason the candida got out of control.
Doing it without fiber is technically possible but I think it's a survival adaptation as opposed to an optimization.
Duncan