I am sorry I did not read all your valuable comments..

These are my thoughts :

For any medical or security reason its fine.

Just for family or other emotional reasons - Nope.

Personally, if something happens to my parents I would leave my job and will spend full time with them... however as I am the only kid and if I have to arrange money then I will try to hire a private nurse and If I cant afford I will surely send them to old age home after explaining them the situation and will bring them back home as soon situations are better.

People especially in old age wishes to be close to their family.