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

I remember the game spawned quite a bit of nice looking sims with just a base game installed, with a city living most townies spawned pear shaped overweight dark skinned blonde with either watanabe or srinivasan in their last name. But I found a workaround in MCCC to let it pull from gallery sim to spawn townies if youre not opposed to that.