Lots of elderly people want peace and quiet in their old age, but young people want an unconstrained life.
It would be good for both if they lived separately. My parents want to live apart from us.
What if old people are in poor health and need to be looked after?
Young people ought to carry out their responsibilities. If it's needed, they would live with their parents.
When I'm old, I'll also be like that.
You need a child first, and that's your duty, too.