What you are saying is that lore does not matter, fiction is totally bogus unless it happens to conform to the ideas you want and that nothing should have to make any sense if any single potential consumer of the fiction might think something is nice.
THAT argument has zero weight. Yes, there could exist Asians. But NO, they should not be introduced in a way that contradicts lore entirely (like suddenly having all of Antiva be Asian despite us meeting and seeing multiple instances of these people looking more similar to Fereldens than anything).
That's not what I'm saying at all.
Lore doesn't matter. But I haven't said anything about fiction. Lore and fiction are not the same thing. "Lore" is what we call the fictional texts that exist within the fictional universe we are reading about. Sometimes lore is "true" within the context of that fictional universe. Sometimes it is false.
Since no one (not even the author, necessarily) has the means to divine the "true" lore from the "false" lore, and since no lore will ever contain the sum of all knowledge about that universe, you can't use it as a reliable basis to definitively determine what is or isn't possible within that fictional universe. And when someone tries to do that, most of the time they're just making assumptions about that world, based on their knowledge of our world.
This is not a difficult concept to grasp!