The innovation groups and strategy councils inside organizations can dictate policy, but there is no reason to believe that the corporate leaders of any organization are going to be wizards at understanding how AI might help a particular employee with a particular task. In fact, they are likely pretty bad at figuring out the best-use cases for AI. Individual workers, who are keenly aware of their problems and can experiment a lot with alternate ways of solving them, are far more likely to find powerful and targeted uses.