We want AI to be as intelligent as Humans. This is the holy grail. But humans are also whimsical, irrational and slave to emotions. So we are attempting to design a system which is replicate this nature as well.

So we want a system which we want it to behave in just about "perfect" manner (i.e. intelligent but not going astray). What passes as "perfect" is subjective and there will be different definitions of it.

Now to control this you want a capability to precisely define the allowed and dis-allowed behaviour. At this point we are essentially circling back to the software systems before the AI.