Why do couples consciously abandon parenting?

Recently I read an article about childfree. It was written that marriages that have no children consciously are considered as selfish, there is a belief that they can not really love and are not able to sacrifice themselves. Why do couples consciously abandon parenting?
One of the reasons may be that people today are much less attached to norms and traditions, they have their own rules in life which they follow. They do not think about the future and want to enjoy life. This is because today's world offers us many opportunities, easy access to everything we want make family values no longer important. That's why people often put fun, education and career in the foreground, and the child is an obstacle. How to make a career, have fun and breed a child at the same time? It is not possible. This is why people get rid of the "problem" and choose life without children, because the child is a responsibility and often a problem for many of us.
Other reasons may be economic reasons. Not everyone can afford to have a child. People work, try to earn money for a living, but it's not always easy and it does not depend only on us. Another reason may be that someone does not feel the need to have a child. Some couples focus mainly on career and money, others simply do not feel the need to have a child, they feel satisfied and happy without children.
In my opinion, having a child is an individual case. Each of us is different and chooses a different lifestyle and is guided by other values in life. So we should not judge other people just because their lives are different from ours.