Creativity ~= unpredictability.
The last thing we need is a "creative" computer system running the world.
I don't fully agree with that definition, but going with it for argument's sake:
Predictable or not (assuming we mean "predictable" here as "predictable by humans" [arrogant IMO]), if the ruling class (in this case sentient machines) is actually smarter, more powerful, and more able to rule the world than humans, than humans simply have no say anymore. It would not matter if the ruling computer system came to the (much processed) conclusion that humanity should be eradicated --
it would be a good and correct decision, because the smartest most powerful class of intelligence in existence has deemed it so.
So it also doesn't matter to a wolf when humans decide that a wolf-less world is better for them?
And that justifies the humans killing all the wolfs? Because, you know, they are more intelligent?
Great way forward!

You make the error of thinking that something that exceeds humans evolutionary development would not be selfish.
You also make the error of thinking that having a human-like intelligence regulating society is optimal.
I don't think we need a human-like AI at all but if you insist you still have a problem in that it will have its own ideas of what is good or bad that don't stroke well with what humans think is good or bad. That is what human-like intelligence is all about.
It is my belief (I am admittedly biased in at least this one aspect) that the point of the universe is to fill itself with intelligence, and humanity is a step in this process. How long that step lasts and its other details such as its end may not be for the step itself to create, and it is comforting to me to accept this. BUT, it does not mean that this step in the process cannot try as hard as it wills to fully control it or otherwise be a part of other steps / the larger process.
The way the universe seems to be developing (dark energy and all) the informational density of our universe will approach zero in the long run.
Intelligence is not converging on any large scale.