Why is it that when it comes to this issue people feel completely comfortable with telling other people how to live their lives?
Wanting to spend more time with your parent's isn't a moral absolute. It's a social pressure that has proved hardier than going to church or getting married while you are still fertile.
If one has a good relationship with their parents, then they are likely one of the closest bonds and strongest links in his/her social support system. Thus it makes biological sense to foster this connection. Humans have strong social needs, and generally don't do well if they are neglected.
Wanting to spend more time with your parent's isn't a moral absolute. It's a social pressure that has proved hardier than going to church or getting married while you are still fertile.