Is overall balance more important than the treatment area when it comes to fillers?

I believe that even if you only want to improve one part of your face, you should consider the harmony with other areas.

I am particularly curious if simply adding volume will yield satisfactory results for areas that affect facial impression, such as the lips or chin.

For those of you who have received filler consultations, were you sufficiently informed about the overall balance of your face in addition to the areas you want treated?