I'm sorry to say this, but you are all not really like you know... very smart and attentive. "Some inteligence"? And there's alien fans saying this? Have you payed attention at all to aliens in the movies? A newborn alien is capable of understanding humans very well, even a chestburster is capable of outsmarting humans, also they manage to learn very quickly how complex machines work (well, they can press a btton, but the queen did manage to work a lift). They are not as smart as humans, they are much smarter, the averege intelligence coefficient of a species is determined by the percentage of the body's mass that the mass of the brain reprisents. Have you ever noticed how big aliens' brains are compared to their bodies? However, they have a hive mind, which means they have their own personalities as long as the queen lets them. They would not pick up tools and start displaying that personality through art and inovative ideas, because in a hive, they are not individuals. All the intelligence they have is used only to protect the hive and the queen. And queens would also not start to do stuff like that, because they may have the authority in the hive, but they are still part of the hive and they do not detatch themselves from that until they feel it may be compromised. If a queen were to remain alone, she wouldn't be able to start doing all that by herself either, because she would feel pretty lonely and would just start a new hive.