An artist does not pick up a brush or a camera for the first time and know immediately what they are going to produce. The process of developing a vision takes time. Sometimes it is years, sometimes decades. It requires the maturation of the artist's skill combined with a his recognition of his taste and how to use those skills to produce works that match his taste. It takes experience, which takes time.
Along the journey an artist gains skills that may not contribute to his ultimate vision. As an example, I have used polarizing filters in photography. But, the techniques I use to create the car photography do not require them. That tool and the knowledge of how to use them have no effect on my current creations.
If you are an artist who doesn't know what his vision is, recognize the value of false paths. Knowing what you do not like is valuable information narrowing the field of the possible toward that which you love.