What is the purpose of parents having children, loving children, and giving for their children?

Recently, I have seen some parents lament from time to time: having children is actually useless.

The reasons are:

From a young age, I had to spend money on training, and after college, I found a job, thinking that financial independence could repay my parents.

As a result, the first month's salary did not think about buying gifts for parents or giving some money or anything, and was busy buying gifts for the object.

Later, it is getting married, and parents give money to buy a house and a car.

After giving birth, parents are busy with their grandchildren. Endless efforts, no returns.

In fact, such parents do not see the essence of having children. Having children is not meant to be financially independent in the future to repay the parents.

Having a baby has two major effects:

First, to put it more broadly, if the Chinese nation wants to continue, we need to have children. To put it more colloquially, do not have children, there is no stubble of young leeks coming out, where do you receive pensions and social security funds? Are there no new taxpayers, all at home "sitting and becoming Buddhas"?

Second, to a lesser extent, isn't having children just for the sake of having a family reunion every festive season? There is also going to "over there", someone to help clean up, isn't it also very good?

In addition, there are surprises that are better, no, just accept the above two. The conclusion is that it makes sense to have children.