Perhaps, but Barcelona itself has some ‘extraordinary’ things to entice you anyway; shopping, entertainment, tapas, a beach in the middle of the city, Gaudi’s weird creations and much much more. A tip for the first-timer is to buy a 24-hour ticket for the sightseeing busses and then you can hop off at various attractions, and then carry on to the next one.
Don’t let pickpockets ruin your enjoyment by stealing your money. There are a lot of them, especially on the fashionable street ‘La Rambla’. Deposit your valuables at the hotel’s safe. Only carry around the cash you need for one day!