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Actually, not wanting children means that you don't know yourself very well. Life is built around procreation. Not having children doesn't mean that you don't want them. It simply means that there are reason why you think having them isn't practical at the time.
Except for an extremely few people, anybody who has real security in life recognizes that he wants children.
I don't understand why someone would post their personal opinions as if they were established scientific facts that are beyond dispute. My friend, this is called personal preference, and there are many people who have the financial, physical, and psychological capacity to have children and raise them, but would rather not do so and spend their time on other tasks. Other people prefer to adopt children rather than have more. Another type of person prefers to have children and even adopt orphans. Another type of person wants to have only one child, while others prefer to have an infinite number. If each of them imagines that they alone are right, they will inevitably see the others as wrong, and this will spark pointless discussions. It's just like religion dialogue, when each adherent of a particular religion thinks that their religion is the correct one, that their god is the true God, and that all other religions are wrong and that they should follow the same religion. While the truth is that we are different and diverse in our doctrines, beliefs, and convictions, and that is life; we cannot all be the same color, especially if our convictions do not harm anyone.
Personally, I believe it is wise to adopt a philosophy of anti-natalism, better than having children when we cannot guarantee that we will truly be able to raise them until they mature.
What does science have to do with it? Except for the literal engineering facts, science is as much of a religion as any 'god' religion. The differences with science are that men are trying to make themselves into God through their understanding of how things work, and that much of science opinion is controlled and manipulated by the wealthy elite. This means that anybody who bases his thinking on science is simply expressing a religious position or opinion just like anybody who presents a God opinion.
As far as gods go, the religion of Ancient Israel as expressed in the Bible is a religion of power. Moses did miracles from God that few others have matched since. And the apostles after the time of Jesus did many other miracles. And that is to say nothing about Jesus, himself. The Bible is a record, not a 'science' fiction writing.
Further, the Bible is a coherent writing over a 1,500 time-period. It is about salvation for mankind that was done by God, Himself, through His Son Jesus. There is no other religion like it. Certainly not science. You can tell by the many people who die in hospitals believing in medical science.
As far as this topic goes, consider the greatest pleasure that everybody has. It's the pleasure of having sex. Sex is the method for procreation. People who want to have sex without having children, are bypassing what the whole system was created for. Pleasure in sex is an inducement to have children, because that is what the whole sex pleasure is for. People who can't put 2 and 2 together about this are simply dense.