Well, i don't think you want creativity in this case.
The whole idea of RBE is that the decisions the AI takes are more scientifically sound than what humans could oversee. So the idea is that it needs to be based on facts, not creativity.
Atonomy is not a problem per se. Your computer does lots and lots of autonomous things.
The problem is maybe that we would not like the cold hard decisions of such a system would make without our personal concent and with no human emotions to fall back on.
Creativity is necessary for autonomy (because autonomy means you can adapt to unexpected situations, and to do so you need creativity).
And autonomy is necessary if you want a system where no human labor is necessary (which is the main objective of RBE proponents, iirc).