
I don't find Canaria stupid she's playing her cards fine. As the 5th commenter below you has said the mindset she has believing the present story is still progressing the same way as the original novel is what annoys some readers here. I think. It should already be plainly obvious the story has changed and yet she hasn't noticed or perhaps accepted that fact.

I don’t know if she just forgot but, didn’t she find out that Gracie, however it’s spelt, actually doesn’t love the prince, she just wanted freedom from a male in her life and he was the best choice. So what she is doing is stupid since she’s fixated on his happiness but doesn’t realise that their marriage was done for lack of better options not love

She doesnt know that the prince like him yet and that prince doesnt like Grasia. PLUS, She had read the book and know that the prince have a happy ending with the grasia and he fall in love with grasia and (we surely dont know if grasia love him, maybe while marrying him she did fall in love)
Like for me I know that Naruto doesnt even like Hinata in the first place but would You interefere before it will happen? AND you know that have happy ending and they had two kids and that they deserve each other. Would you think otherwise?

Ah, I think I see more of what your getting at now, however. The reason we don’t think they’ll even eventually fall for eachother, is because the book made it out that they were in love from the start, not that it simply ended up like that. So considering that it got that bit wrong I think it would be right to assume that their relationship was romanticised in the novel and in real life at most they were actually no more then friends
I read this comment somewhere before. The same stories where the MC dont want to ruin the real couples in the novel. Its says like if you were transported to avengers and Ironman or Tony stark started to like you. You wouldnt want that when you know him and Pepper is the best couple in avengers . Imagine that!! What would you have done? Ruin it , knowing that they had future. And you just happen to be there. And know exactly what to do .
Like for me If I were suddenly transport to naruto and tried to help Him and the concequence of that is him falling in love with me. Would I reciprocate that or Even think about it? Knowing HINATA was the best woman for him?