Love the analogy! We honestly just wanted to have this product ourselves, and that was our primary motivation behind building it.
I agree with the philosophical principle! If you give a rigid observer an incentive to 'remove bugs', it will happily silence all alerts and report success.
Our goal is to make sure that doesn't happen. The investigation agent is actually a separate agent with a separate goal.
In practice, we rarely see the agent just silencing stuff. When this happens, I get on it and make it an eval case :)