Capitalism and communism very much have definitions, which are not actually practiced in anything resembling “pure form” anywhere on this planet in any society of more than a couple of thousand members in human history.

You might as well call our economic system a religion, like Pastafarianism, because what it actually is is a byzantine collection of laws and rules and regulations which have about as much to do with the “ideals” of either captialism or communism as your average US “Christian” Megachurch has to with the written teachings of Jesus.