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

"Beardedgeek;d-959602" wrote:
Seriously? Still, this long after City Living came out?? I went into Manage Households and virtually all random households were, as always, blonde Japanese Sims. And the rest were heavily overweight middle eastern women.

It's already been reported as a bug several times and nothing has been done, so I assume this is a "feature"... but WHY? It seems to me the randomization process is just borked but nobody cares??