That's why I now know two important aspects of building a team : trust and structure.
Trust your developers, especially in small teams. Sure, a single line can break the server, but if someone's been working for three years, losing sleep to help your prod run, they probably won't mess you up. It's still fine to put in place checkpoints but then I get onto the second point : don't set up a single bottle neck that could very well cease to operate. Set up multiple trusted reviewers, not just you.