We won't have true AI until AI stands on its own. Just as a bootstrapped compiler can compile itself, an AI should be capable to reinvent itself without outside help.
Until then, it's just a child-AI, dependent on human brains to be designed and optimized.
But humans aren't even capable of that, and we are intelligent. It still takes a lifetime of learning and experience to create a functional human being, and many never get it right.
Yes, but until AI is better than humans at everything it will not be perceived as intelligent, because true intelligence will be redefined as one of the things AI still is not capable.
And how long time do you give it? The human race haven't solved that problem in some 20k+ years. If we build an AI today, would you wait that long to decide if it is "true"?
Self replication and self preservation are the essence of life and evolution. There is no primary purpose to a biological system other than self preservation and replication.