If we had a coin-flipping tournament (in a bracket like the NCAA) with 64 people, someone would win 6 coin flips in a row and win the tournament. Then they could call themselves a high functioning coin flipper.
I called in sick with hangovers and even drank at work, but never lost my job.
I caused my family distress and missed family functions, but never lost my family.
I drove drunk, but never got a DUI.
That doesn't make me high functioning. That makes me an alcoholic riding a lucky streak.