Mission and Vision Matter. Proper Strategies and Tactics are Crucial
Mission in simplest terms means: the reason for existence / who you are.
Vision implies what you want to become in the future.
Strategy is the means or ways to an end or to the vision.
If you have a mission then you know who you are and what you stand for. From there you can dream for a destiny (vision). Then you can plan according to your mission and vision, by putting down proper strategies and tactics which are in line with your goal / vision.
My opinion is that even larger organisations with a clear mission and vision which are well well guided with values sometimes fail to achieve their goals / vision.
The problem lies in
identifying proper strategies and tactics to achieve your goal/vision. Take the right track to reach your destination, a wrong track will take you to a wrong destination.