Believed? You'd now, and you'd be right.
What if you were in that situation, but were incorrect about what things are good, and, while you had a better understanding of what actions would result in what results, the 8 year old had a better understanding of what is good?
The 8-year-old might view your intelligent plans as a terrible abuse:
>BUT I WANT TO EAT TEN MORE TWINKIES, YOU'RE SUPPOSED TO SERVE ME WHAT I WANT, NOT DEPRIVE ME
Could we similarly be wrong if we think a future superintelligent AI is abusing us? Should we consider submitting to it?
Hard questions.