Thanks for playing and giving feedback!
Your suggestion was an option considered; it was thereafter concluded, though, that implementing it would likely lead to many players skipping dialogues altogether and perhaps not even discovering all characters. Moreover, there's plenty to fail you nonetheless! Wrong ratings are ideally caused by increased awareness to the situation. If a player gives too frequent incorrect ratings and avoids speaking to the NPCs, he should not experience much of the game and never adequately engage with it to care for the consequences.
As the game has a natural limit, and the repetitiveness might was thought to potentially benefit the overall aesthetics aimed at, it was deemed best to keep it in the implemented manner.
(This reminds me of the arguments for and against the Endless 8 arc of Haruhi Suzumiya if you're acquainted; it's really a matter of taste)