Independence

Yes, I know we all love to be independent. But, my question is to what extent? Human beings are social animals.. It's been taught to us since our school days and we do accept it. In this life, during our childhood we need out parents to be with us, to share our thoughts, our problems, our success like sorrow, everything. Moving on there comes a stage where we depend more on friends than parents. We can share those things which we can't share with our parents. And then comes girl friend, wife/husband. Throughout our life we need a hearing ear, we need a resting shoulder, we need someone or other.
I here meet a female who changed my whole perception of seeing independent living. She is over 90 years old. Yes she is. She stays all alone, she goes to church driving her car, goes to grocery store and buys things for herself, fills up gas f for her car, cooks food, does almost everything. She likes to be independent, that's awesome... But is it good.??? At this age..
Biggest question that keeps eating my head..