I can't believe anyone cares if someone else does or doesn't want to have kids. I can't imagine life without mine but I certainly understand it's not for everyone.
I do see a lot if the comments about how terrible other people are at raising their kids or about how terrible the children are from people who haven't had any as at least generalizations and very often probably rationalizations for an already made decision. my good friends sister won't shut up about why she refuses to do that to her body (she doesn't seem very picky about doing other things to it). she's a total mess. a chemical and emotional nightmare. her brothers/sister and mother just smile and inwardly give thanks for her refusal to reproduce. of course i know many mentally healthy and rational women/men who have no plans to have a family. I'm sure some will live to regret it but sadly, I'm also sure some people with children regret it as well. that's life.
kids are difficult, expensive, time consuming, and frightening. and to my wife and I it's totally worth it. to several of my friends, it totally isn't.