Oh, it's not that there isn't conflict. Just that anything that would turn into a larger scale fight (war, rebellion, etc.) is nipped in the bud, as it were.
And automatons, given sentience, are far from "perfect" in the emotional stability regard. Consider:
while some individual automatons can be cruel,
Automatons are going to be very logical. But it is equally pliable for logic and chaos to coexist in a single form, even if that form is non-biological. At least, in hypothesis. There is further pliability in tainted logic, too, whether being reflected from a creator's unstable mind, or just being a natural progression in a "failed" creation.
A human is more likely to be illogical with their actions, reactions and corruptions. Which is a necessary counterbalance to the logic of a non-biological sentience. At least, from my end.
What do you think?