Why do proper die when they are old

because god sees that they are over the real world and god takes them to heaven to have a better life than there last

Explanation:

thats what my grandpa use to tell me when i was little

As people get older, their cells simply don't work as well, and can't stave off disease as easily or heal as well as they once could. As a result, older people may die from injuries or diseases that a younger person would easily survive