I think you're wrong. There are people out there who can memorize gouge like nothing doing, but couldn't think their way out of a wet paper bag under pressure (some foreign airlines seem to employ a lot of these, folks with exemplary test scores).

It typically measures your knowledge the use of aviation information resources (since such scenarios typically involve WX products, other crew, etc), and more importantly your ability to think under pressure. And it doesn't cost much to do.