No one will buy a skyscraper design that has no doors or windows and crumbles under a breeze. Architecture and industrial design are two examples of things that

No one will buy a skyscraper design that has no doors or windows and crumbles under a breeze. Architecture and industrial design are two examples of things that need to cater to practical needs yet are usually regarded as forms of art. Of course there's also people who think that art is only art if it doesn't do anything and isn't "needed". This also creates problems (for example, can a movie be art? if yes what of the "jobs" needed to create the movie are art? who are the artists?)