beyond how interesting the messages the game conveys are, something i think is extremely impressive is that it's not heavy-handed at all. you could conceivably play the game once, think it's a unique and charming rpg, and be done with it, none the wiser to the fact that this conversation is even relevant to the game
i think a lot of that is testament to how solid nearly every aspect of the game is. good writing, good gameplay, good music, good pretty much everything. it doesn't feel like a shallow game simply designed to deliver a message like some other indie games do.
then again, i think one could also argue that the entire concept would fall apart without a strong base.