I think a person should choose a path and stick with it for a period of time in order to get a feeling of how it works for you. Because we are different beings with different qualities and personalities, there are different paths. Some paths are complete and can lead you to a state beyond the limits of the mind.
The focus on the breath is not enough to move beyond the mind, but it’s a start. In the beginning, you should develop perfect posture and focus on the breath. Practice and the rest will come.