I object to the comparison. The splinter races in FC are distinct types with notably different characteristics. Human groups have roughly the same characteristics. The human splinter races (neanderthal, homo robustis, etc) are extinct. Apart from some geographic isolation here and there, human population groups have been interbreeding continuously our whole existence.
Okay, I could continue this conversation, but I think it's time we moved on from this point. Please.
Fantasy Craft has decided to model Species and Races in this manner, and that's the way it is. If you don't like how one or more species have been treated in the rules, then there's is nothing stopping you from tweaking their rules to suit your home game. Just remember that losing a penalty (like Iconic Classes or Banned Actions) means losing some bonuses as well.