Her approach might not be the literal peak healthiest, but that doesn't mean its wrong. If she's only having a drink every once in a while and is getting 7+ hours of sleep most nights then the negative effects are probably negligible anyway.

To a certain extent, most people need to sacrifice some amount of health and performance to live the fullest life they can. If you don't feel that you benefit from that, though, and its important for either of you that you share your lifestyle, then perhaps you just weren't that compatible.