You can create value through confidence, for example selling an unrealised concept. You can also create value through competence, eg by making something great.
The consequence or impact of what you do requires both the confidence to create a gap between what is and what could be, and the competence to close that gap.
Does this mean you should work on your weakest aspect? NO, never do that. Simply partner with someone who has what you don't.
Where does your natural talent lie?