I can't, because I'm not. I also suspect that many others are not.
I recognise and acknowledge the positivity you bring in this article. Unfortunately, I think it is a simplistic view of reality.
Its major failing, in my view, is that it implies that 'family' has only one definition. A minor one is that it claims. that "every family member has a certain duty to play ..." I question that but you give no reason.
The reality is that, if the common understanding of family is used, i.e. parents, children & perhaps, in an extended family, other relatives, then family is based on genetics and, leaving those aside, for all intents and purposes, on chance.
None of us choose our families or the other people within them, save perhaps for those two people who initiate them. There is no 'given' that we will need, want, like, dislike or in any other respect, feel a particular regard or disregard for a family member or they for us.
The notion of 'blood' being the ultimate bond is as fictitious as nationality meaning devotion to a nation's mores, traits or policies.
So, as well motivated as I believe you to be, I can't agree with your article. I was never considered of any worth to my family, but rather as an unfortunate mistake who was nothing more than a burden. The best I can say of my parents or 'family' is that they gave me shelter and some essentials for survival. In that sense they were good people. However, I was never included, respected, needed, wanted nor valued.
I'm also quite sure that I am far from the only person to have experienced something similar.
Take care. Stay safe. ☮️
#borc