From: (rw)

Actually, you're also supposed to hold a Bible between your elbow and
your ribs. :-)

That actually might help to catch fish though, and it has nothing to do
with casting. :-)

The only things that matter, from the perspective of physical dynamics,
are the forces and the torques on the rod grip. I think a good caster
can achieve those with either a passive or an active wrist.

But doesn't the use of the wrist make it easier to load the rod?