<<some people might read that and believe all that is needed is to keep the
ball in the center and proper rudder use will do that every time.>>

And even that's probably not as easy as some make it sound.  Picture this:
You take off and have an intermittent engine problem.  While trying to get
your brain around it, the plane slows to near stall speed.  The engine comes
back on, yaws the aircraft and then dies again (an intermittent fuel supply
could easily do this).  The aircraft now is at stall speed with a
significant yaw velocity.  Is the pilot sufficiently quick to respond?  Can
he "feel" the ball or does he have to look at it to tell for sure?  Can he
do that while looking for a landing spot.  I say not likely to most of the
above unless approach to stalls have been practice and there is sufficient
tactile warning, regardless of the years of experience or number of hours
under the belt.

Gary Casey
ES project, 0.5 hours in type