Even an imperfect mirror can cause you to have true insights about yourself.

When you stare into a mirror, even if it's wrong and you can tell that it's wrong, it causes you to self-reflect.

Even if you're self-reflecting to say "wait, the reflection I'm seeing is wrong, what's wrong about it?"

The more self-reflection we do, the more insights we have about ourselves.

The imperfect mirror is just another excuse to self-reflect.