Do hard forks in Bitcoin reduce its scarcity value?

The argument for a high value of Bitcoin is scarcity – i.e. “There will never be more than 21,000,000 in circulation.” But doesn’t each hard fork of Bitcoin (or its forks) “create” another 21,000,000 digital currency tokens? I realize some forks will die off for lack of interest, but not all – Bitcoin Cash, for example. Sorry if this is a naive question – I am a beginner in the blockchain/cryptocurrency world.