They see themselves as clearly as they see the process.
They have trained to match the two.
The low performer is not yet deeply inside the process, they are outside looking in. They focus most on what to do and are not yet connecting on who they need to be.
You can see the difference in the performer who is deeply inside their performance. The flow and the synthesis. This is a learned skill from trained self-awareness.
The low performer is doing a performance and the expert has learned to be the performance.
Are you doing or being your performance?