Of course it doesn't. We all have a voice and a right to express our opinions no matter what. Sometimes gut feelings are more pertinent than knowledge.
I don't have full on IBS but I have something like it. Certain foods don't react well with me like dairy or fatty, greasy foods. I can eat those foods but in moderation only so sometimes I'll have too much of a 'danger' food and I'll end up shitting all night lol.