People like to watch dancers for different reasons. Since some dances are done for exercise or contain specific steps. The observers may notice the same steps and can predict how the dance will go. However, ballet is a different type of dance. It contains artistic expression. Usually a ballet routine must be choreographed to the music. A choreographer comes in and decides the dance routine for the ballerinas.
They will construct certain steps to be performed together with the rest of the group or individually. The steps are different too. This allows for creativity. The audience members can not predict what will happen next. Ballet is a beautiful dance that is usually slow in nature with many spins. Ballerinas are usually on their tiptoes when dancing.