I don't think its that black and white...or should I say there are plenty more shades of grey...?
I didn't grow up eating much wheat; I ate grains, but they were traditionally sprouted. I basically ate a traditional Russian diet, which, though carb-heavy, was, I suppose, alright for a growing kid. When I moved to the city I started eating processed food and WHEAT. Now all I remember was that although I'm definitely not an acute, highly sensitive celiac, I used to have a lot of digestion issues; stomach aches, gas, etc. All the time. I remember my tennis practice suffering, because running around with a hurting stomach is no fun at all; my teacher would put it down to me just being useless, and I was too scared to mention my stomach pain because I've always feared doctors/hospitals, and was afraid I'd be sent to one if I mentioned my discomfort.
These things all stopped abruptly when I dropped wheat. I transitioned to palo very slowly, and dropping gluten grains in particular was a first step.
Fast-forward now, I've been grain-free for a year. Last week, I had dinner at a friend's house who promised she'd let her mum - who was doing the cooking - know I was 'intolerant' to grains. However, something went wrong and flour ended up thickening the mushroom sauce of the ill-fated beefstroganoff. I spent the night immobilised with stomach pain, curled up in a fetal position. There was no question of it being psychosomatic since I didn't know of the presence of the...spawn of satan (lol at the tag, by the way!)...in the sauce. The next morning, my friend calls me, drowning me with apologies and asking if I was alright. Well, by then I was. I'm glad I survived that night without trying to obtain illegal morphine from someone.
That is just one story, mind you. All my gluten encounters since have ended in feeling like I'm being eviscerated.
So...here the issue isn't really the dose. But I used to eat wheat without really knowing it was messing up my stomach, so perhaps its a matter of exposure. The more you expose yourself to toxins and allergens, the less you notice the stress you're putting on yourself.
I mean, this is different, but do you acutely feel each car honk, each shove on a crowded street, as fight-or-flight stress? No, because we're just attuned to chronic, low-level stress. My thoughts are that its similar when it comes to stressors like gluten for non-celiacs. Everyone's gut is harmed by gluten to an extent; but some feel it more acutely than others. Primal eating undoubtedly sensitises you more to toxins.
Its part of being alive; it helps you avoid harmful substances.
Lots of Paleo Love!