The way I see it, parents have obligations regarding their children, but not the other way around. Children didn't ask to be born, it's the responsibility of their parents. I don't think it means that parents should sell their houses for their children, though. Parents are responsible for providing an adequate standard of life and ensuring that their children obtain basic education. Then it's up to parents how much they want to help and up to children how much they want to take care of their parents when they get older.
Viewing children as an investment into your own future is very egoistic and pragmatic. I don't think it's a good foundation of a healthy relationship.
Yes I agree with you. After giving birth to a child till he reaches adulthood, parents have to take all the responsibility to guide him and develop his life. But this does not mean that the parents will sell the homestead for the child and spend it on the betterment of the children. First of all it is mandatory to fulfill the basic needs of everyone and then all kinds of measures are needed to upgrade the children with the times. Because that child after a certain age has to fight the earth to save himself and his next generation as you would for your child. Life is a game here those who can fulfill every step of their life very carefully are successful in every way.
I feel like teaching your kid to be a responsible adult who would do better is a great way to develop a very good citizen of the world. Many parents care what grade you got at math, or history or whatever, and yet they do not realize that your kid is about to grow to 22+ years old without learning a single thing about money.
I think this would solve the issue, teach your kid how to earn money, in a fake child manner of course, like monopoly money for every chore they do, so they would "earn" right to tv, or pc, or tablet whatever. Go clean your room and get 2 hours of tablet, go wash the dishes and get 3 hours of netflix, that type of thing. It would really make it clear for them the value of working and how money is won, that would be a lot better for them to learn.