Many believed that man would never fly, certainly never walk on the moon.
Getting to the moon took almost 10 years. We had to "invent the technology to invent the technology to get us to the moon."
AI? Since you mentioned flying and getting to the moon, your point's valid. Eventually it may happen. I don't belive it'll happen in my lifetime and there's a difference between AI and flying / getting to the moon:
AI actually performing reasoning and value judgements is a distinctly HUMAN thing. Putting that into an algorithm?
How does that end for humanity? Who's bias/logic/values/judgement criteria is going to be programmed into the algorithm?
I remember dad telling me one day: Son, just because you can do something, that doesn't mean you should.
That's exactly how I feel about AI.