I thought there might be a reason they can't have one outside, and they were trying to find a way to have it inside. Maybe they live in an area with lots of predators, or an unfenced yard, or no yard at all, or something like that.
There's a lot to learn about any kind of pet, and everyone has to start somewhere. Many of the "ridiculous" questions make perfect sense if you assume the person really does not know the answer. It happens with any subject, and I've asked plenty of stupid-sounding questions myself over the years (I'm sure my mother remembers a lot of them! But sometimes she didn't know the answers either.)