Making the right decisions is necessary for success. it doesn’t matter how well one executes on the plan. If the wrong choice was made at the outset, the result is wrong.
The challenge is making decisions under conditions of uncertainty. It’s not knowing what will happen in the future that makes the choice hard now.
Much complexity is illusory and really nothing more than uncertainty. The apparent complexity is in the mind. There is no complex system in the world that maps onto all that thought. In the real world, the die may be cast. We may be entirely unable to influence the state of the world. Yet we build castles of anxiety in our minds worrying about what will happen when it already has.