Why do we find it okay to negate another mommas feelings or experiences? I am mainly talking about…

Why do we find it okay to negate another mommas feelings or experiences? I am mainly talking about pregnancies right now. I'm not saying like when people make bad decisions or are careless but when they are told they are lying or it can't be what they said and then are full on attacked for it. It's constantly repeated every pregnancy is different but we fight about all of it and try to argue someone else's experience. 🙁😖☹