Labels like capitalism and communism are more window dressing than actual function

Nah fam. There's no point in labeling sets of ideas if they're rendered useless the moment they diverge from your imagined "pure" form. Being more complicated in practice than just a simple textbook definition doesn't mean they aren't "that" defined thing, it means textbook definitions are always fundamentally weak and flawed. Oversimplifications, models used to describe, not blueprints used to build.

Capitalism is roughly everywhere, underpinning everything globally because of its roaring success. Communism is roughly nowhere, for the same reasons of capitalism's overwhelming power.

The distinctions exist and matter.