>People rarely compare it directly to something like a "Real Food" diet - they go from a lot of processed crap to mostly non processed stuff on the outside of the grocery store and then see huge benefits. But I suspect if they just switched to a Real Food diet in the first place they would see most of the same benefits.
Keto is a very wide category that really only means restricting your carbs to 30g/day or so. You can be real-food keto and real-food not-keto.
You can be keto vegan, you can be keto carnivore. Well, all carnivores are keto. In fact the studies in the last couple years, tend to all show that effectively being keto is what matters.
The jury is still out on why it works. As you said, we've been eating tubers for eons. So why suddenly in the last ~75 years or less has it become such a problem? Perservatives, glyphosate, GMOs? Everyone seems pretty clear that our food has become toxic in some way. Lots of different approaches that eliminate grains and seed oils and drastically improve your situation. We haven't figured out what exactly is doing it.
>I think we all know that the average person in the west is likely not eating nearly enough of these prebiotics and in addition many have other digestion issues as well. There is a reason scientists call them ESSENTIAL fatty acids and not "kinda sorta important" fatty acids.
The funny thing to me, we have people effectively going 'real food' afterall a carnivore is also 'real food' but vegans are doing the same thing, but different direction on 1 spectrum and seeing the benefits as well.
The huge problem... economies collapse if we fix whatever it is. If you go to your local grocery store and throw out everything that isn't 'real food'. The grocery store becomes empty. Fast food places shut down. That's a pretty significant portion of our society who no longer work or anything. What are they to do? We can't fix the problem.