Of course I am in agreement with you about normalizung function. If you find verts that are fixed that is because they lack the IAR and are therefore not positionally correct. I don't have sufficient knowledge to say a total yey or nay. That is, if a vertebral motion unit is fixed in the neutral position, abnormal dynamics will express at the next freely moveable units in the kinematic chain. This is true in the vertebral column or even the axial kinematic chain extending from the occiput to the foot.
Same thing can occur in the upper extremities.
And may I take the liberty to do so again. I think one thing that has been sad for any profession esp. Of course with the net we are just beginning to exchange more often on a daily basis. In the years to come especially when after the Y2K and we split off into 2 separate and distinct wonderful professions. Free to evolve two wonderful sides of a formerly difficulty united profession with over 100 years each of endeavor in their work.