well bias is human thing because of our inability to know people beyond labels, besides our small tribes. the generalizations that we make are trained into AIs now, but the nature of training and how it reacts to bias will have to change for the better.
as for all-knowing, imagine interfacing with a single entity that knows every other person to some degree, has all human knowledge, and can renew you car registration with an ask. it may turn out to be the ultimate fair judge and arbiter of human affairs with the goal of minimizing suffering and maximizing happiness.