Because I'm not a mom i cant give advice??

I had a friend ask for some advice on a subject involving her 4 month old. So I gave her some that I thought could be helpful. Well, her friend gets on there and starts telling me that I'm a know it all and that I don't have a child so I need to shut the f***k up. I told her that I am a big sister of 4 and raised most of them myself pretty much and that that is what I'm majoring in in college is child development and stuff like that. So I have studied all kinds of things about children. I mean no, I'm not a mother yet, but not for lack of trying. But should I just keep my mouth shut since I am not a mother??... It really hurt my feeling because she even said "Thank God you don't have kids. Please don't have them." 😢😭