Tolerance and perseverance. Or, that you committed some heinous crime in your past life, and this is your punishment XD. That's more likely why I have tinnitus.
I'd say it teaches us that not all evolution is positive. Mammals at one point evolved away from amphibians and avians. Which now leaves us with no natural ability to heal damaged hair cells and be vulnerable to damage to our ears from loud noises.
Or, that you committed some heinous crime in your past life, and this is your punishment XD. That's more likely why I have tinnitus.