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It doesn't, it's just a PR statement to get more people on board.

Read the article?

Nvidia released it to make GPUs less desirable to crypto miners so gamers can actually get their hands on some.

Read the OP's question ?

If "nvidia released it [LHR] to make GPUs less desirable to crypto miners", then, "How does removing LHR help the _gaming_ community?"

Allows owners to make back some of the money spent on the hardware via mining, a la NiceHash and friends.