I see it as a bit simpler.
We eat fruit because it is complete food and easier to digest and asimulate and has less negative side affect issues.
All food items feed organisms living paracitcally in the body to a greater or lesser extent depending on the availability for assimulation by the paracite, bacteria, ect.
The missunderstanding of the overgrowth of paracites ect problem is another issue, however simply put, the system must be allowed to return to ballance.
The cleaning of food to the extreme is really for those who are in a state of inoptimum health or living a lifestyle of habits that might incur unhealth if their organism is comprimised by ingesting certain amounts of unintended organisims.