While I'm not childless, I do support those who choose to be. Why? Better question, why not? For those who have made a conscious decision not to bring children into the world is not only their right, but shows they have nothing to prove to others by conforming to the standards and opinions of others.
In a recent Newsweek article I read in detail about childless couples and adults. I applauded their decisions for being mature enough to know what is acceptable for them and thier lives. As I said, I'm not childless, but had I not chosen to become a parent, I don't think I would have had anything to prove by becoming one. If someone knows they're not financially, emotionally, socially, or otherwise able to raise and be responsible for a child, why have one? The religious sector would obviously disagree with this kind of thinking because it's contrary to Biblical (or other religious manifests) teachings. Yes, the world must go on and races of people preserved, but at what expense? Why sit in judgement of the childless and not judge those who have multiple children; some of which they can not take care of, locate the father, or any number of other absurdities.
With the alarming rate of inflation, economic cutbacks, poor healthcare, (the list is long), why not reduce the birthrate? I know a guy who has known since his mid 20s that he didn't want children and said that he would have a vasectomy to ensure he didn't "accidentally" get a woman pregnant. Is he selfish or sensible? Rhetorical really seeing as there will be so many that argue his stand. The same question can be applied to women and yeild the same outlook. Personally, I think neither has a thing to prove. Having a child doesn't define you as a man or woman. Having a child doesn't give you a one up on someone else, nor does it make or break you. It's a personal choice that shouldn't have to be explained.
Having an only child resorts said parent to unlimited barrages into his/her reasoning, which too is equally insulting and offensive. Why does that person even have to justify that? They don't! There is no rule that says one has to become a parent, but there should be a rule that says, if you do, you better know how to take care of it.
I spoken my peace!