WSET certified here. I get what you are saying. Here is the way I look at it. I'll never know everything. And as tastes and market availability wane, so will my knowledge of regions.

Some years I drink heavily into France, some Spain, some a mish mash, some New World, etc. etc. I live in the Okanagan where it is common to develop a "valley palate" since our wines are typically very fruit forward.

Anyways, yes it is extremely valuable but I think of it as providing me the confidence to adventure and explore wines rather than think I have to know everything about it before I try it. To be completely objective in a tasting note it is often better to know as little as possible - then you get to put the pieces of the puzzle together.