Quote Originally Posted by Satinavian View Post
DMs tend to flesh out what is more likely to show up and what the players ask about. The rest gets very broad strokes.
And in the standard human dominated setting where most countries are human majority, the PCs start out in a human majority settlement and other races mostly show up as small minorities. enemies or at best places for a short visit, that means human cultures and habits get fleshed out and little else.

If the group starts out in a non-human community and only interacts with/stays in nonhuman countries and various nonhumans are always in the spotlight, that leads to a whole other level of detail.
I disagree. That does not reflect the games I run or the games I've played in. That it represents the games you are familiar with is fine, but it cannot be said about the game in general.