I think it's probably closer to the thing where everyone has blind spots in their field of view where the eye has blood vessels but you just don't ever notice it because your brain fills in the details.
Not to say that I can't see it, it just doesn't affect the way I interact with the machine.
It’s just how the human visual system works. How do you feel about the large amount of your visual space is blocked by your nose. Close one eye and look at your nose. It’s surprising how much is blocks but you are essentially blind to it.
