It's a beautiful idea but, most D&D games aren't modern progressive worlds.
Fantasy world has to be beautiful to enhance the feel of loss if it will be lost.
Fantasy world has to be rich of different races to increase weird sense and crystallize peculiar human aspects in a defined ethnic group.
Fantasy world has to be in conflict to enhance epic and adventure.
this 3 were the basis in fantasy literature for many years.
Now something has changed, many worlds are corrupted and already lost (thanks Vance you were ahead of your time), now epic builds on the save the status quo concept no more. Now epic is built by survival.
Save Status Quo concept is son of post 2° world war conflict. Save a beautiful world from being corrupted by insane ideology.
Survival concept is son of the present problems that humanity faces. No matter your race we are all in for survive to ourselves as population grow, resources are less and less and global warming change our habits and habitat.
Grim fantasy is here to remember us that grim times are ahead. Horror fantasy is here to familiarize ourselves with the idea that enemy cannot be overpowered.
The unusual race attraction in classic status quo saving fantasy can be explained by the nostalgia of times where humans already has a father that drove their step.
The unusual race attraction in survival fantasy can be explained by the subconscious desire to be different. The desire to find a way of being human in a different way. A way that permits us to survive.