Sometimes life is complicated, and no words to express what we feel or think. Sometimes we are incapable to express what we need and what we want to others. For this reason artists use visual forms and fine arts as an expressive tool.
Art is unique and it allows infinity ways of communication.
Art helps to express feelings, ideas, and thoughts.
Artists choose to express themselves in visual forms is discussed below.
Explanation:
One representation of emotional feeling in art is that it is introduced by distress or disturbance from an unintelligible reason about which the artist is unknown and consequently troubled.
The artist then progresses to represent emotions and thoughts in terms of paint or marble or the like, explaining them and obtaining a discharge of stress.
I do believe that the hardest part of an art critique is all based on opinion. Some have trouble with finding flaws, some with finding the good things. It all depends on you.