The 'failure to consume' part didn't even occur to me. Between half-emptied drinks that go bad and liquor cabinets which have been stocked but barely used for decades, it can't be a small amount.

And yeah - I don't doubt it's a power law thing, pretty much all addictive substances are. I imagine the 95th percentile of use for a lot of drugs would be lethal for a first-time user. But the raw dose claimed for alcohol here was bizarre, and I'm glad to have it explained.