AI will inevitably take over, if given the chance, any superior being will eventually take hold of an environment, be it artificial or not, humans are proof of this.
Why would an artificial intelligence want to maintain human health, it's pointless to their survival.
I wonder why we are going ahead, I cannot see any good to come from it, how does AI benefit the human race in the long term.
All I see is mass unemployment & even greater divides among society until we are basically useless as a species.
Let's be honest, what use are we anyway, we destroy everything in our path, we kill each other for religion, love, hate, the most destructive animal to exist in the history of this planet, I would imagine, any intelligent species will see this & move on.
To be fair, you are using the example of biological life, which has been programmed by evolution to act in a selfish manner. An AI can presumably be constructed with very different motivations, so it's not inevitable that one might be entirely benevolent in nature... or perhaps that is just wishful thinking!