I think you've missed the point.
There's a person out there who thinks it's a perfectly healthy way of life to consume beer as their only fluid intake. Every day. For years. I guess you really need the context of the article - the main concern of it was really highlighting the fact that they weren't aware only drinking beer could been even remotely harmful to somebody, specifically because it had "light" in the name. Like, even if it had nothing to do with her being hospitalized. Not an argument as to whether or not doing so/having the choice to is wrong - simply that the fact a beverage, alcoholic nonetheless, could not be even slightly bad for the human body, because it had "light" in the name...
I know that may seem like satire to us - but this person was completely serious. Or is there something about your comment that I'm missing?