Character animation can’t happen without rigging, nor does rigging have much purpose without animation. Thus an animator who knows nothing of rigging is in trouble and vice versa. Take Wayne Dixon for example – He’s primarily an animator but also does rigging because he knows it’s a part of animation.
Though in “the industry”, pro animators aren’t usually expected to rig nor pro riggers expected to animate. But as far as knowledge, they’re both better off if they’re informed of the other skillset.
That’s why we combined them into one overall Animation Flow.