Even when they are quitting to warn they cannot do the job right. The real threat is not in these systems becoming smarter than us. It’s that they can shift the power balance (by being a tool to creat misinformation, spam, and harm).

https://www.bbc.com/news/world-us-canada-65452940

And btw they could have stopped all this in 2013 already when company (like Facebook and google) started grabbing them. Rather they used it as an opportunity to exploit private data to further their own research.