Almost all greatest artists are laughed or refused by their contemporaries.Especially the Imprissionists are very good example, people cann't accept them at all at very begining, but later people give them very high reputation. Since then, people dare not to criticize any kind of arts, and try our best to accept any kind of modern artiests. Nobody want to admit he/she does not understand arts. We, as well as the artists, have to bear some responsibilities for the situation of modern arts. If we do not require the artists to do something, of course we cann't blame them to let their works be so difficult being understood by us. So criticism is definitly nessesory.