I don't have any protruding after I eat
Same here. I've measured my waist before breakfast and right before bed and the measurements were identical. Prior to my current diet, I would have this huge lump on the lower right side of my stomach by the end of the day that I've since realized was fiber. My issues with fiber began after two years of following Doug Graham's 80/10/10 diet (raw fruit and veggies) in my mid 20s and only got worse after my spine collapsed and my intestines compressed. I can get away with more fiber since clearing the SIBO I had, but it's still minimal. I'm at least able to have some now without it triggering debilitating migraines and subsequent vomiting.