Not just impostor syndrome, but the willingness to see what is actually there.
I think this is why art (particularly drawing classes) can be so hard for most people starting out at a later age. One of my teachers would constantly say 'don't draw an eye - draw what you see'. While well baked into our "memory" and knowledge sphere, our mental model of what is an eye or a human head isn't actually what is there.
See also "Gorillas in our midst: sustained inattentional blindness for dynamic events"