That is exactly what it means. People without children have absolutely no idea what they are talking about and have no means of acquiring that knowledge except by having a child.
Yes, there are many things about being a parent that you can't truly know or understand until you experience it for yourself, but that doesn't mean that only a parent can see when another parent has screwed up.
So I can't criticize law enforcement because I'm not a LEO? I can't criticize a politician because I'm not in politics? I can't criticize a woman because I'm not female myself? I can't criticize a parrot owner because I don't own a bird? This is an absolutely ridiculous line of reasoning
>People without children have absolutely no idea what they are talking about and have no means of acquiring that knowledge except by having a child
So a male doctor can't be a gynecologist because they have "no idea what they are talking about and have no means of acquiring that knowledge except by having" female genetalia? I can't have any idea what it's like owning a parrot except by owning a bird? Again, this is absolutely absurd. Having a child does not enter you into some elite class of individuals that no one else can understand, and it's perfectly acceptable for me to criticize you despite not having children myself
“The whole problem with the world is that fools and fanatics are always so certain of themselves, and wise people so full of doubts.”
Your male OB example is really close to hitting a subject where people are sometimes angrily and even violently attached to their positions and on which some insist that men do not even have worthwhile opinions — merely because they are men. Similarly, others stake out positions that it is okay to “punch up” because they allege that ethics, propriety, and justice depend on group identity. These are utterly irrational by the same point that I believe you’re making, but knowing your audience is crucial. Good luck being heard on certain subjects.
Parenting isn’t that extreme, but a strong emotional component is present. With criticism in general, if in the audience’s view you haven’t earned the right, then you’re just running your mouth. You may have heard of Powdered Butt Syndrome: anyone who has powdered your butt does not want your opinion on money or sex. Being a parent changes everything in ways that it’s difficult for non-parents to understand. Even if a non-parent accepts this on an intellectual level, the deeper visceral appreciation is still missing.
Yes, being late is rude. Screaming children in a restaurant while others are trying to enjoy a meal is annoying. Parents should not allow their kids to behave like ill-mannered brats. To really oversimplify, becoming a parent tends to raise some parents’ tolerance to misbehavior. I can talk about gross topics over dinner that would have caused my pre-kids self to ask for a change of subject or to excuse myself from the table. Parenting can be exhausting. All relationships are challenging at times. Sometimes people choose to pick their battles.
All that said, some parents dismiss advice or criticism from other parents too. It must be nice to have your perfect kids, live in your perfect neighborhood, and send them to their perfect school. What do you know about my situation? You have X and I don’t. I have Y and you don’t.
Anyone can criticize to criticize. Doing it with love to actually help someone else is much more delicate.