My family did a trial once...Mom is not alchoholic and one brother...well I'm not sure, but ....
What I find is the idea of never drinking socially is pretty dificult for the "non-alchoholic".
The difference lies, as you said, in where I go from that one drink...but my family has aknowledged that saying I'll never drink again is not easy for a non-alchoholic.
But we are who and what we are...Acknowledging that others can drink for social, emotional or other reasons without becoming addicted to the alchohol is something I have to understand.
Mom still drinks wine with her friends, but she did realize how hard it is not to take a social drink when she tried this experiment of not drinking for a period of time.