What is the purpose from sacrificing the parents to their kids in-order for for them to live better life, white the parents themselves lives a life they never wanted doing things they dreamed to make the opposite of it.
Why the equation not to be fair, cause at the end this sacrifice is not securing the happiness of their kids as well, and when these kids grow up brfore they live the life they want they have to get married and have kids that they have to sacrifice as well and enter the same loop of their parents.
So all the parties will be losers in a big zero sum game.