As soon as you can demonstrate decent financial returns (ie. the AI can run a company better than humans can), suddenly it makes sense to put a lot more $$$ in even if returns are diminishing - since whoever runs companies the best gets control of a big chunk of the world economy.
Well yes that's the worry isn't it? That people will soon all be unemployed? Just because it sounds farfetched doesn't mean you should stick your head in the sand, seeing the pace of development these days, that is "reasoning properly" and it just seems you are trying to block out what seems inconvenient to hear.