Why are friends more helpful than relatives?

i think it is because we are bonded to are relatives by blood which means that we have no choice on who are relatives are gonna be. while friends, we became friends with other people by choice and by the likeness in our characters. when we became friends with someone, it is sure that we care for that person while a relative may choose whether to care or not to care.

Although it's not always the case but obviously you choose your own friends and don't choose your relatives, your relatives may hate you or dislike you but friends always care for you or they wouldn't become your friend in the first place.