It seems easier to just do what Casi suggested and go "huh, strange; must be the high populations and / or cultural and environmental impacts". It's hardly as if a bias towards the home worlds of various characters affects much -- especially when I've not found said bias to be particularly strong. There are a few more, but that's all I've seen, admittedly just from the folks I've noticed who have it public.
As for why, then in my particular case the thought process for having Kyber originate from Dam-Torsad boiled down to not wanting to fiddle about too much with a universe I was largely unfamiliar with; three decades gives plenty of room to fiddle about with further detail, other locations he may have spent time, and so on, when I'd gotten the general feel of the game, and frankly I just wanted to get started and see what it was like. No point getting bogged down in backstory when simple, feasible solutions exist, IMO.