I agree life is seldom as simple as the examples, the small numbers are just for sake of brevity.
In any case, none of that takes away from the crux of this conversation that programmes like mirroring surrounding demographics and others are discriminatory and have no place in free and civilized societies today.
It's a good idea to measure the imbalance, and sometimes it's a good idea to try to do something to work against it. It requires a lot of care, but it's not inherently wrong. When there are a bunch of bad actors, everyone else trying to be completely neutral leaves things quite unbalanced.