Motivated reasoning effects everyone. Even scientists can see what they want to see over what is. One of many reasons peer review is an important part of the process.
The Stormlight Archives is an epic fantasy series where all of the major protagonists struggle with mental health in realistic ways. Kaladin will do great, heroic things, and still grapple with depression because it's part of who he is, not something he just "gets over" because he had one good day.
Motivated reasoning effects everyone. Even scientists can see what they want to see over what is. One of many reasons peer review is an important part of the process.