I am not sure that this is how I would teach my kid to be grateful, especially because the kid might perceive it to be forced and might backfire in the future.
Anyways, we might be overthinking this. :)
I assume you are only responding to "the kid would not need any reasons to be told if s/he is hungry.". It is true in most cases, I was not accounting for depression and so on, but that in itself might dissipate hunger.
Most toddlers will eat when they are hungry, they will not just go hungry. Power play or power struggles complicates things, I deliberately did not bring it into this. Regardless, I still do not see that it is necessary to come up with reasons that are completely wrong or silly. :)
