Gitea gets you: a nice GitHub-like web GUI, including for stuff like managing users; 2FA; some integrations; web hooks without having to add git-hooks to all your repos; and extremely-useful-to-some-projects features like git-lfs support.

If you don't want or need those things, bare git repos are fine and certainly easier to support (not that Gitea's that hard, though a few issues/PRs I've noticed have caused me more than a little concern about the overall quality of the project).