Something that bugs me about the universe...
...and the people who write Science Fiction shows.
Here's the thing. I guess Earth is a rather small planet. However, I couldn't list all the cultures, languages, manners of artistic/aesthetic expression, religions, foods we eat, belief systems, and any of the other ways we are infinitely diverse from one another across the world. And that's not even including the animals and plant life and different climates!
So then I watch Doctor Who and they travel around visiting this or that planet, or the Doctor talks (albeit rarely) about his planet. So let's just take Gallifrey as an example. Now, let's just say if Gallifrey was the size of the Earth, am I to understand that the WHOLE PLANET was composed of Time Lords and the city under the domes and nothing else? That seems very unlikely. I mean, maybe Gallifrey was one country or continent on the planet but what about the rest of the planet? I mean, the planet is called Gallifrey, and everybody speaks Gallifreyan? That's like saying that on Earth everyone speaks Earthian.
And it's the same with every planet they go to. They only ever learn about one part of the planet, so they can't really make any huge generalizations about any planet they visit, right? The Ood are the only beings on the Oodsphere? Or what about the fighting on Messaline? There's no one else on the other side of the planet and it's completely covered in a swampy tundra?
Even if one of the planets was as small as the moon, it still would be huge and capable of sustaining more than one kind of people and language and culture, wouldn't it?
I know the writers do it because it's easier that way, but I was just wondering...