It's more nuanced than that. Especially in the current age of rampant propaganda. An existing community could have size, and use that size to spread massive lies. Then use moderation to stamp out any fact checking of their lies. Sure, you can create a competing community, but using what reach? Your reach has been stamped out by moderation. Reach matters. Allowing low follower accounts/viewpoints/communities access to the masses is critically important. It prevents the consolidated influence structure that exists today on TradSo.