It used to frustrate me, & then I realized that their lack of a brain make it impossible for them think on their own. So I just do not engage them in topics that require thought process. 8>) My anxieties & frustrations towards them evaporated after that course of action. You can only have a meaningful conversation on certain topics with those capable of thinking for themselves.
They do have enough of a brain to be indoctrinated. I suppose that is all that is required to be led like stupid sheep or zombies.
We can add that they have very malleable minds. Their masters are pleased.