The family is like a lamb or cow you could easily slaughter. If we do not, at least among Hindus, Zoroastrians, Sikhs, Jains and Buddhists, it is because they give us more while they are alive, healthy and strong.
People in other cultures constantly invoke individual rights to disown and deny, and walk away from the cohesive ambit of their respective families. Also, parent’s make a life in togetherness difficult by attaching conditions; and marraiges today, with or without pre-nuptial agreements, already envisage a separation sooner or later. As a result, families keep getting dysfunctional all the time and are destroyed within the span of a few generations.
But the family is the closest and the most immediately natural group, of which we are a part.