Tbh, i don't even agree with that view of family. You give people more chances, but chances do run out. Don't let yourself be abused by bad people just because you shared a few years of your life.
I never said you cannot cut them out of your life until they amend their behavior (tough love), but you very rarely likely to completely disown them 'not my brother', especially if they redeem their flaws. Nothing like that will ever play out with a work colleague.
