Very few people use many of the concrete facts they learn in college in the normal life. If a college education can be defended from a standpoint of practical usefulness, it must be because it teaches some generalized/abstract "how to think" rather than the specific facts. And if so, that should age much better.
The "aging better part" is where I feel there must be a better way to think about it.
It needs to age better because we tend to think we only get one chance to learn these things. If it was more of a norm to keep learning once in the workforce, there would be less question of making knowledge age, as it would be easier to keep it fresh.
On the other hand I think a 1 year or 2 year specialized course on a very practical subject to enter the workforce is a clever approach, as long a the person keeps learning about the other subjects (history, geography, philosophy, etc.) going along.
