I don't find it hard to believe that eventually some AI may kill a number of humans.

You give it instructions to do something, it goes off the rails and after a certain point starts having like malware, destroying things to accomplish its goal. Depending on what it destroys, it may kill humans.

With this said, I'm not exactly in disagreement with the view that AI companies with upcoming IPOs are using fearmongering to convince people that their models are very powerful and to also block others from competing with them.