The mechanism of action of glyphosate inhibits several important amino acid production processes in the gut. I'm simplifying here, but not having glyphosate in the food supply would be a good thing for the gut, and the science agrees on this.
Glyphosate for field prep also doesn't really come through in food, it's much worse with the pre-harvest desiccation.
You are inferring from our crude understanding of processes in general. Evidence is more specific.
Do you have an exclusion trial comparing glyphosate vs non-glyphosate diets? This is amenable to natural experiments where one country bans it on a specific date and the neighbor does not.