Gee, how did two bottles of wine / 7 pints of beer a week get categorised as light? For me light would be one or two beers a week max.
A small glass of wine is also definitely less than the 200ml you'd need to get anywhere near 1.5 liters a week.
I'm very much open to complete drug legalisation but when I see the stupidity with which we treat the drug ethanol it makes me wonder.