Keep in mind though, that though brilliant, Jung's theories are also still just theories - they might be correct in many instances or approximate reality well in others, but that doesn't necessarily mean they ARE reality.
You do make a point though that all humans have "male" and "female" aspects to their psyches, assuming one sees those as labels for what we generally associate with either - aggressive, protecting, individualistic for male and nurturing, pluralist, cooperative for female, but that doesn't mean that everybody has them in equal measure - androgynes might, but that is not necessarily going to be true of people who identify as one of those two.
The fact is that, in many ways, neurobiology and cognitive science is outpacing psychology nowadays, as more and more of what we used to regard as "ghost in the machine" type stuff is now being shown up as down to biology in some way. Male and female have very different brains, very different approaches to solving problems, but that's not a bad thing - the two approaches are complimentary and equal - it's only when one of them becomes dominant, as in our patriarchal society today, that things spin out of control. Of course, in that one also has to recognise that individuals are different, and just because a group of women are more likely to be nurturing than a group of men, that's not going to be true in comparing any two individuals from either group.
Which is not to say psychology doesn't have value - it's hugely valuable because our mind, though it arises from our biology also arises from our experiences, and more importantly from our consciousness. If we can understand which aspects are down to biology and which to experience, we can consciously change our minds.
But yeah, getting back to your post: I think that the anima/animus is a good approximation of reality, but as with everything else, we shouldn't fall into the trap of saying "most people have both so everybody must have both!" or arbitrarily saying that the two must be equal in the psyche. for some people that will be the case, for others not, and we need to respect the reality rather than imposing an ideology.
And I agree, Tool is awesome.
Mina.