Why might views on having children be changing?

first of all, recently people in their twenty’s and thirty’s value their feeling happy more then forming a family. forming a family is not that important then that they make their life happy. in other words, it’s enough to enjoy their life without kids. they have many things they can enjoy such as netflex, youtube, game device.

second thing, most young adults have individualism ideology. actually in modern city society, In terms of survival, it doesn't matter if you have a family or not. rather, it’s better without kids in survival. 

third thing, young generation avoid hardship of having a child. raising a child consumes energy. and it need a big money. accordingly they must work for income. all of this process is a huge burden. this is reason why today modern couples decide not to have child.