One of the best paradoxes of leadership is a leader's need to be both stubborn and open-minded. A leader must insist on sticking to the vision and stay on course to the destination. But he must be open-minded during the process.
A leader's job is not to do the work for others; it's to help others figure out how to do it themselves, to get things done, and to succeed beyond what they thought possible.
One philosophy I have at AngelList is I would rather have someone working on the wrong thing and do it their way and be motivated, than working on the right thing and do it my way and not be motivated.