As someone who was abused by their family, neglected & in the end put into care because my mother wanted to be with someone who beat the crap out of her & eventually killed her rather than have her children at home,I am missing your point quite frankly. To have a mother, father & for that matter any member of my family give a damn would probably if made my life so much easier, instead I have had to find my way in the dark which let me tell you is not an easy thing to do.
It has also had a big impact on how I cared for my own children, something I hate to admit but it's true.
You should be grateful that you had a family regardless of whether or not you actually want them in your life, but you never will be because you have no idea what it is like to not have this stability from the day you were born.
Obviously there is no law to say you must continue to have contact or even care about them & if you decide you don't want that then that is exactly that, your choice.
Family are our whole stability in life, they are there when we need them, sure not always but pretty much for most.
Sure you have friends but your friends will change & move on & maybe out of your life but your family are your family regardless.
My guess is you are rather young as anyone with a bit of age also has wisdom something that you quite clearly lack.
& the saying "we don't know what we have til we lose it" is so so true but I hope for your sake you never need to find this out & maybe just appreciate what you have in your life.