Here's another way of looking at it - if you take out a person's visual cortex, their experience of vision is basically that they are blind. If you take out a person's dlpfc (part of the frontal lobes), their experience of decision-making is analogous - they are 'blind' when it comes to making up their mind.

e.g., This poor bastard can't even decide what he can't decide about. He can talk about things he is going to do in the future but chances are he won't do any of them.