Families have always helped eachother out financially or otherwise. It is a sign of a healthy society. I for one wish to abolish the post-war nuclear family - and return to the extended family support networks we used to have.
I think you have a good point, however, that all depends how well family members get along with each other.
I would never want to live with certain members of my family.
Why? Because some don’t share my values. Some are loudmouth opinionated blowhards, who handle money and other issues completely differently that I do. There would be endless conflict living with some of them.