That was inaccurate and silly. You cannot replace fluid replacing drinks with booze.
People have been consuming alcoholic beverages and most of them living to ripe old age for countless centuries. And for most of those centuries water that was not directly from a spring or processed in some way that involves boiling (as in a brewery or distillery, or a tea pot) was chancy to drink. The water from the tap in your house has probably been heavily processed with chlorine (which is itself a poison). I did not say nor mean to say that one could live entirely on booze. Only that those who indulged in moderation were consuming something safer than the unprocessed water that was generally available to them.