I mean, many games include quizzes or puzzles related to history or literature, even big RPG or Horror titles, why shouldn't a VN dev be free to do the same, if they want to?
As long as it isn't overdone or almost impossible to solve, I'd say it's the dev's prerogative. Again, it shouldn't be done to death, it shouldn't be a constant annoyance, but apart from that I think people here have developed an approach that nothing they don't like should be in a game they enjoy and that's not how it works.
I'd understand it better, if it was a really big thing, a significant change in direction or something like that, but here it's just a quiz.