To be fair, Single was also used. Some people will see it as all-encompassing or a blanket wish that effects everything, while others see the possibility of a wish for themselves and what they will do with it. While the question was directed to individuals in essentially a room, not the entirety of the planet. For example when someone wishes for rain, they often didn't mean for rain for everyone, how long it will rain, or how heavy it will be. It's also why wishes are dangerous, because the interpretations are the persons viewpoint or bias, and something being literal or said it a specific way is basically the story of the Monkey's Paw, tempting fate, morality, and being careful what you wish for.
Imagine saying, I wish there there were no starving people, and they all just vanish, instead of being fed.