Not all blindspots are passive things.

Some are active, lumbering beasts, laboring outside your notice to block the view of things that could harm your ego.

If your ego finds it threatening, your body will throw up blindspots so you literally cannot see the threatening thing.

Your body will do this even when you don't ask it to.

Which means you won't realize it's happening.

If you're very powerful in an organization, the organization will scramble (without you even noticing) to give you exactly what you want.

The blindspot is an emergent thing, being constructed and strengthened by the organization for you.