Double income no kid family is cowardly thought by a married couple. Basically those who are very selfish only decide that path. A normal person with a sense of responsibility can't think about this. If one considers sex as the primary purpose of conjugal life then it's uncertain how long they live together. In that case it is ok to be DINK. It seems that the DINK family is predetermined to be separated for any alternative advantageous situation. In order to maintain love and respect in relationships on the long term certain basic sacrifice is essential. It seems like living with a passenger to different destinations.
Every relationship is very important in life. We need to play different roles to be accomplished in life. The role of parents is not only important for the children but also for them. The parent kid relationship is one of the most holistic relationships without any materialistic goal.
Once in a short journey by bus, I saw parents interchange a seat to sit beside their kid. Though it is a simple thing but it implies a deep love and affection.
It is seen in many countries children are not so responsible towards their parents nowadays. If parents feel sad about it, it is their limitations and undue expectations. They can't expect something in lieu of their sacrifices. Someone else also sacrificed for them. It is a tradition of caring for kids for all kinds of living beings.
People with the mentality of the DINK family can't have proper bonding with their parents. It may not always be one sided. Both may be responsible.
There is also a need for the future generations for many purposes. The number of dinks increased by 1.7 times in Japan in the year 2012 since 1980 and it reached 3.62 mn.
Thanks