To bring this comment back from being wildly off topic, the thing with Civ is: it's undeniably Eurocentric in how it frames the world. The concepts it uses to drive game play, the tech tree, the intrinsic notion of "progress" in a historical sense which a) defines the idea of the game itself and b) is, in its current incarnation, something made up in Europe during the Industrial Revolution.
Well, they are doing their best to fight that notion of progress with their current spate of tech tree quotes

It's a bunch of entertaining game mechanics with historical dressing more than an history lesson or simulation. The driver is the basic appeal of those sorts of game mechanics. You are leveling up your Civ, improving it's int/cha/faith/culture stats, building your +5 Sword of Angkor Wat, etc. A SimCiv sort of game where you could play with different societal constructs would be interesting but very different mechanics.
For me, make the Civs you include have interesting game play mechanics. I'm all for diversity as well: I sincerely enjoy it and learning about it personally, and I believe that geography was destiny for the most part rather than an intrinsic ability of a certain people to build monuments immediately on city founding. If Romans had rolled a tundra start and the Inuit rolled a salt start with a mountain and a river, we would be hearing about them differently - except Romans without Rome and Inuit without tundra would't be Rome/the Inuit and the the whole hypothesis makes no sense anyway: which is why the game is historical fantasy.
Granted, I know some people are different: some people really enjoy playing as their home nation, some people love true start maps with true start civs and the nations they associate as significant, etc. But I feel these conversations always turn into oddly 'philosophical' ones (guilty as charged) when they are primarily just people's gameplay tastes.