but seriously, I think that family is a pretty broad term. Anyone that you really trust and would give help to in a time of need that would do the same for you is family, regardless of them being related by blood or not.
Duty, it's just duty. You have to love group of people you don't like or respect and back them to the damned hilt for no actual benifit because when push comes to shove they got you're back despite the fact they know you're a cunt.
Friends and your lovers are your achievements you earnt their love and they earnt yours, family is the other guys your arse is bound to them by blood.
What is the family? A good investment in the future? The ideal economic unit? An eternal agreement decided by blood? A group of people one cherishes most because of who they are and past experiences?
In traditional Confucianism the family rooted in selfishness. The parent needs somebody to care for them when they're older so they make a child. That child can be treated like shit and taught nothing but society and the law of the land will demand that child care for their parents until they die peacefully. These laws still exist in all 3 of the China's.
In modern societies the family is rooted in selflessness. A parent is supposed to sacrifice so that their child may live a better life and find their own fulfillment. The adult is expected to care for themselves with perhaps some help from their child if possible. No laws demand anything from the child and society will not destroy somebody for allowing their parent to live in squalor.
The elites boil family down to properties, titles and prestige. Can you hate your family and want them dead but still consider them family? The elites seem to have a good answer to that question.
Those Confucians that want a slave for when they reach 120 years old? Both the parent and child considered each other family. Those parasites of the modern day that abuse the kindest people in the world? They consider their parents family. All that royalty killing each other for power? Those people considered each other family, even as they were killing each other. It's all relative.
However, my idea of the family is the latter that original question. I don't think many of those Confucians actually practiced that nonsense and I think those elites cursed themselves with dysfunctional families through their own actions and values. Family is not exclusively about selfishness or even selflessness but a mixture of both. You gotta give something to get something meaningful out of it and the more you give the more of that intangible goodness you get. I can't describe it but I think there is something inherent in the human psyche about wanting loved ones to be better off, even if it requires personal sacrifice and I don't think it has anything to do with blood or a desire for a good retirement. I think it was love for family, not a desire for a sweet retirement that drove Chinese workers guys on. Should a child be required by law to care for their parents? No. But a child who neglects their family like that has a family in name only as far as I'm concerned.