Having two options give you an implication in the game, even though it's a fake one. Making you think, even for half a second, about what you would answer, help you immerse yourself in the story.
That's a common game design "trick", used in a lot of games.
When all 3 options are exactly the same, it's also deliberate from me. It's a way to express to you, the player, the mood of the MC. When Laura asks a question and you have three "YES YES!!!" answer, it's me showing you what's going through the MC's mind at that moment. It's a storytelling element, the same kind you could find in any RPG in which, for example, all answers are sarcastic because you're playing as a sarcastic character.