However traditionally normative it is to focus on threats and weaknesses in planning, it's a ritual that implies that the future is knowable enough to be predicted and that success is the extinction of weaknesses.
Well, reality is that unpredictable change becomes more possible in a world that grows increasingly dynamic, complex and connected. Preparing for or reacting to our knowable threats does not make the unknowable threats more knowable. All we can do is get continuously better at agility and creativity.
Success is the engagement of strengths in ways that make our weaknesses, which we will always have, less relevant. Focusing on our strengths is core to agility and creativity.