To take that literally, I imagine it would be horrifying to know the future in as much detail as you care to ask for, but because it is true, to be unable to change it at all. It would make you an NPC in your own life.
So you'd rather be an unaware NPC than an aware one? Feel like you have "Free Will" even when you don't? Only want the truth when it's pretty and prefer a lie when it's uncomfortable?