My take: if you submit code without the approval of your peers, and that code causes a noticeable issue in production… well, everyone will think “if only they have added me as a reviewer we wouldn’t have this issue!”. Sure thing, the bug could still exists in prod even after peer review, but then at least that would have meant that the bug wasn’t easily discoverable (i.e., the author and the reviewers missed it).

If you think you’re smart enough to submit code without bugs and without peer review, that’s fine. Take into account that your peers may not think you are that smart if you do that. Software engineering is mostly about dealing with people (well, almost everything in this world is about that).

Obviously if there’s no one to review your code, you may as well go ahead and push it without approval (unless your company has policies against that).