There seems to be a lot of fear revolving around the idea that an AI will kill us off. But I would hazard that as unlikely. We don't tend to exterminate, to kill off, species. Counter examples of the kill off hypothesis include but are not limited to:
1) Pets
2) Work associates (e.g., our livestock dogs)
3) Livestock which we harvest something from such as eggs, fiber, milk, etc. (Of course, eventually we kill them but there are far, far more of them because we get a benefit than there would be if we did not raise them so it is more a matter that we cultivate them than that we kill them (off). People tend to worry about being killed off, not being used. After all, the government uses us for its benefit and people don't seem to mind (too much).)
4) Zoos (Not many needed for this.)
5) Nature Parks - conservancy (but we won't need very many of you humans for that either.)