Elders take decisions even if painful for the benefit of their children

The best example is when a child needs an injection or even a surgery.
The parent, despite the bond and sensitivity to how much pain the child would go through, gives permission to the doctors to go ahead.
The parent is rational, looks at the longer term as to what's better for the child, and accordingly makes the choices.
Also the reason why parents let the children leave the country in pursuit of better pastures. Despite knowing that they'd have lost once and for all, support of their own children during old age.
It is up to the child, now an adult, to make the choice as to what's the correct decision, for the long term, in this case, balancing between giving care to parent or comfort to the child.
If you are in a war zone or impoverished country, the choice is a no brainer, in the interest of continuity of life, to leave your native until the situation gets better, if at all.
In countries like Bharat though, the choice should definitely lean towards coming back to take care of parents. Not just because the country is safe, with development opportunities, and culturally better to bring up children. But also because our culture is rooted in taking care of the aged.