This is true for the majority of the US too. As much as I do understand it and promote responsible alcohol service, you can’t exactly control what someone does once cut off. There could be other issues at play here.

Small anecdote - had to cut someone off as a bartender before. He came in appearing sober, had one drink, stepped the the bathroom, and came back severely intoxicated. He had clearly taken something we didn’t sell in there. Called him a cab and he pulled off shit-faced in his car before it could arrive. Gave police his tag number and never heard back about it. Had he done something similar to this woman, I would’ve hated to be on the hook despite doing the right thing.