There is NOTHING wrong in deciding to be childfree. Many people have children because they were inculcated by parents, relatives, and religion to have children. They were indoctrinated that to be married eventually means to be parents. Yes, many couples have children because of societal, parental, and religious pressure.
They are told if they do not have children, they are selfish and not leading a full and fulfilled life that only children could bring. Although childfree couples are increasingly accepted, they are still not viewed as authentic families the way couples with children are viewed. It takes an extremely strong and self-assured childfree couple not to succumb to the pronatalist pressure to have children.
Alas, many couples have children although they subconsciously do not want them. As parents, they regard their children as noisome conveniences and they are perfunctory parents to their children. There are parents who are GLAD when their children are away from them, either at school, camp, or with relatives. These are the parents who become unglued if their children with them for a certain period of time. Also, these are the parents who hope that when their children reach 18, push them out of the house. They AREN'T happy having children and their children AREN'T happy being with them.
Only a small percentage of couples really and genuinely want to have children. They see parenthood as a sacred and beautiful vocation and their children know it. They see their children as precious, God-entities instead of the noisome, barely tolerated nuisances that some parents feel about their children. The former actually ENJOY their children and view their role as parents as loving, caring, and nurturing their children to be the people they were meant to be. Sadly, such parents are RARE.
Children are highly instinctual. They know where they are loved and wanted and when they AREN'T. Many children are treated as conveniences by their parents at best and highly intrusive nuisances at worst. Not every couple is meant to have children and some are BETTER without children. However, many couples succumb to the conditioning that as married people, they MUST have children which some do to their UTTER REGRET later on.