I can see why someone would be like wtf if their "viking" input produced less than 90% white people results, but there should be an equal wtf if "CEO" produced 90% men.

One is a historical fact that is never going to change, the other is a job in society where the demographics can and will change --- at least partially as our expectations of what "normal" looks like for that role are updated. By perpetuating the current (or historical) norm for a given role the biases of what person we naturally consider appropriate for that role remain unchallenged.