Why is 90% of all auto-generated townies Japanese with blonde hair??

I just wish they'd give us the option to turn the generating of townies off. I keep all the premade sims that come with the game in my library as unplayed and I wish they would just use unplayed households to fill jobs at bars etc. I would rather see Don Lothario working at a bar or restaurant than Riko Yamomoto, a blonde haired Asian girl that decides to wear the worst collection of cc she can put together for her oddly shaped body and hideous facial features.