If you're young and your parents aren't old, it's doable.
It's also doable when you have siblings to take care of older parents. I know you say "Most of our families will be gone in a few years." But what if in less than that time they need care?
Relocating back to where your elderly parents are, especially if you're older can be a hassle. For example, if you are 50 years old and your parents are 75 years old, and they need a caretaker, you would need to relocate, and get a new job later in life (often at a pay decrease).


I didn't mean to imply that they had elderly parents, I just meant that is something to consider if they did.