The potential consequences here are rather more dire than slight shifts in the relative size of employment sectors. A hard takeoff of superintelligent AI could be an extinction-level event, or even the extinction-level eventuality that solves the Drake Equation and makes the universe devoid of life.

I certainly can't say that the pessimists are correct, but I also can't say with certainty that they're incorrect. I do think it's silly to imagine that the only configuration for intelligence requires human-grade empathy, or that all sorts of differently-intelligent systems well below the complexity of the human brain, couldn't be lethal.

https://intelligence.org/ai-foom-debate/

https://en.wikipedia.org/wiki/Recursive_self-improvement

https://wiki.lesswrong.com/wiki/Foom

https://wiki.lesswrong.com/wiki/Paperclip_maximizer