I’m old enough to remember the Blood Alcohol limit being .15 and knowing People who were pulled over for being intoxicated being put into a Cab by the Cops and sent home to sleep it off.
Of course the Banks were only open from 10 to 3 back then too. #;^)
Your actual ability to drive or impairment is irrelevant these days, a cold number is so much easier for dim mentalities to deal with. Makes sweeping up anyone that had wine with dinner out that much easier as well.