Because if it's a game based on real-world (no matter how loosely), any divergence and out of the ordinary rule needs to be explained away with in-universe reasons if this game wants to be taken seriously. Can't just handwave it away with the "it's just a game" excuse... People need to make up their minds already. Is it just a loli game made for faps where anything goes, or is it a "romantic story" with "talented writing and complex characters"? If it's the first, then OK, I'm not arguing but if it claims to be this profound romantic visual novel, then it needs to be somewhat believable, and when something far-fetched happens, come up with an explanation you can buy.