Chaosmancer
Legend
I find your argument wholly unconvincing. I can intellectually understand why this line of argument could make sense to a particular person with a particular set of aesthetic preferences and design priorities, and how Halflings could pose a problem to that person. However, I am not such a person, nor are most people who play D&D.
As long as you continue to insist insist your preferred paradigm is the only valid lens through which to evaluate the game, you won’t make any headway in this discussion.
EDIT: to put it another way, the things that are important to you and that you build your argument around simply don’t matter that much to most people. The dissonance that you say exists between the narrative conceit of an unassuming, pastoral group of people and the supposed lack of fictional justification for their status as such just isn’t a issue for most people. It simply doesn’t have the weight for most people that it does for you.
Also, I disagree that there isn’t sufficient fictional justification. There is plenty as has been pointed out to you, it’s just not good enough for YOU, which is fair enough, but it’s not the same as there being an actual problem.
EDIT2: Despite my earlier tongue-in-cheek posts to the contrary, I actually think the very existence of dragonborn is dumb and unnecessary for a whole host of reasons that make sense to me. I’m not going to bore you with them, because I expect you to be wholly unconvinced unless you happen to share my aesthetic preferences. I’m not going to write paragraphs articulating why you’re wrong for liking dragonborn as is, because that would be unproductive and patronizing.
How do you know it doesn't matter to most people? You want to frame this like I'm the outlier, but you could just as easily be the outlier in not caring how a group of people interact with the world.
And generally the justification for Halflings being overlooked is "they don't do anything" which is pretty hard to justify when people also went out of their way to confirm that halfling adventurers are common place and we all know that adventurers... do things to affect the world. So halflings never affect the world, except when they are adventurers and then I guess they don't count as halflings? That doesn't make any sense.