"Give me control of a nation's money and I care not who makes the laws." Mayer Amschel Rothschild (1744 -1812).
Sobriety is required because drunken drivers are an obvious risk to their own and other people's safety. Not sure how the state can enforce 'concentration' in a driver (do we ban anyone from driving if they haven't had 8 hours sleep the night before?), and as for 'observance of societal norms', since when has smoking in a private space been considered abnormal?