Indeed. Intelligence in D&D isn't quite the same as it is in Fallout, which I suspect is the progenitor of the "low intellect dialogue" idea. I don't think that the lowest Int you can get to in BG3 is the equivalent to the lowest you can reach in Fallout. Though you can certainly still have low Int dialogue options based around being slow on the uptake, not paying attention, forgetting things, etc.
