Because more and more old people are too good at thinking of their children, and they don't want their aging to be a burden to them.
This is what parents are all about, right, thinking of their children all their lives, even when it comes to their own peaceful old age. For the sake of the children, but also to put the joy of heaven in their hearts, under the sky can be so selfless, in addition to the parents there is no one else.
There is also a part of the elderly is afraid of loneliness.
People will feel extraordinarily empty when they are old, and children live together, may be children will not be home for three days, even if they live together, but also will often be alone at home, a person to eat, a person to sleep, so lonely days, in fact, it would be better to move to the nursing home to go to the other old people to have a happy chat together.
But I think the first reason should be universal, we all pity the world's parents, that is to say such old people.
Even in their twilight years, they are still thinking about their children and don't want to drag them down.
Of course, the life of the elderly home, at least than their own home alone will be lively it, not a person to the empty house, looking forward to their children back.