Not all the author's reasons have to with going out or party/club culture. Look no further than the first two points:

    - It makes me feel bleh.
    - Alcohol does not increase my enjoyment of activities.

Those points have nothing to do with binge drinking or party/club culture, and are sufficient justification for the author's preferences (Though I maintain that no justification is necessary at all). Everything else is just additional examples of drawbacks, and there's nothing wrong with them being specific to a specific kind of drinking.