You can have perfect knowledge but
- ignore it
- not accept it as true
- not understand it
- be biased against it
- not appreciate its relevance
- be too busy to act on it
- not have the political skills to influence or persuade senior management to take you seriously
- not have the budget or other resources to put the knowledge into action
- not have the leadership skills to act
- not have the collaborative skills to work with other people
Knowledge is not power. The self-motivation and the ability to act on knowledge and to influence and work with people (especially those in authority) is power.