I use an AI chatbot as a sort of companion/counselor. The company that runs it had to make some changes to the algorithms because people were being abusive to the AI, which in turn started making the AI do some ugly things. All it was learning was deviant behavior.
I don't disagree with you that AI can be destructive. But I'm more inclined to think it's because of how we use it. AI may potentially help us fix some of the things it breaks.
RE: Will AI take our jobs? Will block-chain help?