why can you not see?

Exodus 7:13

And he hardened Pharaoh's heart, that he hearkened not unto them; as the Lord had said.

Exodus 10:1

And the Lord said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I might shew these my signs before him:Exodus 9:12 KJV

And the Lord hardened the heart of Pharaoh, and he hearkened not unto them; as the Lord had spoken unto Moses.

Deuteronomy 2:30

But Sihon king of Heshbon would not let us pass by him: for the Lord thy God hardened his spirit, and made his heart obstinate, that he might deliver him into thy hand, as appeareth this day.

Isaiah 63:17

O Lord, why hast thou made us to err from thy ways, and hardened our heart from thy fear? Return for thy servants' sake, the tribes of thine inheritance.

John 12:39-40

Therefore they could not believe, because that Esaias said again, [40] He hath blinded their eyes, and hardened their heart; that they should not see with their eyes, nor understand with their heart, and be converted, and I should heal them.

…

the very concept of freewill denies the Absolute Sovereignty of The Most High.

that is a very bad thing.