The author didn't say he gets drunk every night, he said he drinks every night.
I have a beer or a glass of wine with dinner most nights. I get drunk (i.e. have more than one drink, feel drunk, feel worse the next morning) with a much lower frequency.
I also have a glass of wine that goes with some meals, but I don't cook "chicken in wine" every single day. Wine doesn't go well with everything. When I'm eating something unhealthy like pizza, well, you gotta have beer with pizza, but I don't eat bad food every day, so... Or even stuff in between good and bad, I had saki and sushi last weekend, close enough to natural human food to not bother me occasionally, but not eating/drinking that every day.
Of course, it's Wikipedia, so who knows if it's true ... but amazing nonetheless.
The reason it doesn't outright kill you is an enormous amount of evolution to occasionally consume "somewhat overripe fruit". That doesn't mean you're evolved to chug grain alcohol like water, or get drunk every night like the goof in the article, it just means your body is quite very well used to handling a bit of fermented grapes once in awhile.
Hacking one's body, is like eating non-human food like grains or potatoes or beans or artificial sweeteners / colors / flavors.