It's amazing how people try to rationalize away the phrase "I could care less", much in the same way that Star Wars apologists try to rationalize the use of parsecs when talking about the Kessel Run. Maybe there are black holes to navigate around, and minimizing the distance is the sign of a good pilot, or maybe this, or maybe that... or maybe George Lucas just made a mistake, you know?
So when it comes to people rationalizing away "I could care less" as being some nonchalant way of saying "yeah, I could but I'm not going to bother" I just don't buy it. It's a misquote of the perfectly unambiguous phrase "I couldn't care less". So when I stumbled across a rationalization of that, my mind wandered upon what I think is a pretty damned good analogy of why it doesn't make sense: I could eat more.