Or, like I said, how many DMs are not saying "There are no Lizardfolk, Goblins, Hobgoblins, Bugbears or Kobolds in my game world" and are actually telling players that those races are evil and not for players to use. Again, not saying that you say that, not judging your table, and not trying to get into a discussion about the nature of evil and monsters. My point is that while people are saying that including the "weird races" in DnD like Tabaxi, Tieflfings and Dragonborn make it a "Mos Eisley Cantina" and that is too much for their belief, the wilds of DnD contain dozens of intelligent races and cultures.
The Drow Empire
The Duergar Empire
The Yuan-Ti Empire
The Mindflayer Empire
Orc Tribes
Gnoll Tribes
Goblin Tribes
Lizardfolk Tribes
Hobgoblin Empire
Kobold Tribes
Giant Clans
Sauhaguin
Locath
Grung tribes
Kuo-Toa tribes
When we are talking about "building a coherent world" are we only talking about the civilized world? Why? Even when we had only the Core Four, that wasn't the extent of all sentient life. Yet a lot of this discussion is focused solely on worldbuilding in terms of what the players can play and not... the world.