No, AI is not a threat

We have all seen movies depicting AI as a threat. In Avengers 2, Ironman created Ultron so that it can help avengers to defend people from enemies. But Ultron went out of control and wanted to dominate people, becoming an enemy. But as a professional machine learning engineer, I do not think AI will dominate us. There are a lot of pessimistic opinions making you think that AI and machine learning are turning modern society into a dystopia.