I’m dealing with what I’m pretty sure is SIBO and am basically currently on a no suger diet, natural or added, and looking at the extreme low FOD map diet of no sugar, no gluten, no dairy for a while. It’s really hard to avoid all added sugars, they put that shit in fucking everything and you can’t trust the nutritional labels because they can say 0 grams of sugar per serving if the serving size is small enough. (Classic example is tic-tacs, ingredients are basically just sugar, but per serving size they can claim 0g of sugar because the serving size is one tic and one tac)
All that to say, cutting sugar out of your diet is definitely doable, and honestly I’ve never felt healthier about my diet as much as I hate how it’s being restricted.
There are infinite ways to combine rice and beans and meats with spices that are nutritionally complete. You probably wouldn’t have any issues with veggies either so that opens up the diet considerably.
Definitely no chance those things could be developed without the incentive to kill other people behind it