Although I much prefer Fine Arts (I am working to be an artist), I would say that arts can be united as one universal language, a language of expression, imagination, impression, and beauty. Fine Arts would be better, because of the fact that imagination is of such boundlessness, our human body is incapable of expressing complex and elaborate expressions through movement. With utensils, we (fine)artists are capable of creating ever-lasting work of meticulous details.
Performing Art has many limitations. Fine Arts lasts forever, where Performing Arts can only be seen through real-time, paintings, pictures, etc. Fine Arts can be used to depict Performing Arts, and thanks to Fine Arts, we can get a sense and knowledge of the past culture before photography was invented. Without the help of Fine Arts, we would never have had any ideas of the past, and there will be no traditional performing art.