Sunshine31-I agree it is sad. Sometimes family members are consumed with their own needs or vices that they can not defend or rescue a struggling family member.
For example, if you have a parent that is an alcoholic or emotional unavailable, it would be better to seek help from a friend instead of trying to get help from a family member that is helpless.
In this case, the family member will choose the alcohol over the son or daughter even though blood should be thicker than water.
However, the son or daughter might feel a sense of obligation to the impaired parent because of the notion that blood is thicker than water and may seek to help the parent instead of allowing outsiders to intervene.
Often children of alcoholic parents grow up fast because they have no choice. They often assume the responsibility of the parental role and in a sense switch places with the parent.
They take care of siblings because of their sense of obligations and turn out to be great leaders in the workplace.
Sometimes however, they may resent the sense of responsibility brought on them prematurely, but most see the sense of obligation as too great to let go of so they continue to care for everyone because they feel that blood is thicker than water.