I have been battling digestive motility issues for 6 years. Without fiber, I end up with horrible constipation. Laxatives help to some degree but because I also have an abnormal anal rectal motility disorder, I end up having to wear protective underwear. Everyone is different and my gastric motility study came back with >52%. Individuals have a wide range of motility dysfunction. If mine were 85% vs 10% our abilities to digest food would swing just as widely. I have achalasia and dysphagia as well.
Drinking anything while eating fills the stomach and results in instant regurgitation. I have found waiting two hours before consuming liquid works much better. Gastroparesis affects our ability to socialize, and enjoy holidays, and requires unceasing daily vigilance. Giving up salads, nuts, seeds, whole grains, and other heart-healthy foods is disabling and possibly injurious to our overall health and well-being. On the positive side, baby food in the squeeze packets are good when going out.