@CO3 if you have 2 people who eat soluble fiber, and 1 of them is constipated and the other isn't then bacteria overgrowth will only happen for the guy whos constipated, the one who isn't constipated from the souble fiber doesn't have bacteria overgrowth because hes having bowel movements
One cannot say souble fiber = bacteria overgrowth, it depends if they're constipated or not