The exact percentage (proof) of alcohol in the various kinds of legal commercially brewed/distilled/fermented beverages is a knowable, consistent, and reliable figure. A person can know how much alcohol they are consuming which allows them the option to control the amount they ingest over a given period of time.
I saw it the first time. That's why I asked the question of you, "So, getting intoxicated is OK, but 'only' as long as you know the exact percentage of the chemical intoxicant that you are ingesting...?"