low stomach acid is a symptom of nutritional depletion though...it's not mutually exclusive. It's placing your focus on a different place, and one further down the cascade from my perspective. Low HCl is related to having too little zinc which is common in children with....food allergies. It's not the only reason, again candida, heavy metals etc. can all create this situation. It's just important not to throw out the possibility here because "it's more likely to be low stomach acid."
Hope that makes sense. These things tend to cluster. It's hard to have heavy metal issues without having yeast and food issues. It's a chicken and egg thing. It's ALL connected.
And while I believe you can heal without removing triggers, you need to have really, really good support to know if it's working or not. From my perspective that generally happens more often if you are using several healing modalities to really support the body and create a space to heal. Otherwise it more often than not becomes a balancing act...getting nutrients into the body while continuing to stress it.
I didn't remove all of our triggers...just the top ones. But we did a LOT to heal. I didn't just rely on the diet, which for us, was SCD.