The more I think about, the less reason I see for a dry joint. As for rotational wear, I don't think this will happen since there is a ball joint right adjacent that is designed to rotate. I've got to believe a clamped joint would have enough friction to cause the rotation to take place at the ball joint.
I think the reason for the tapered joint is that it makes a joint that can't have side to side motion. If the had ajoint in which 2 flat pieces were joined by a bolt the clearance around the bolt would be availabe for movement. Alignment would change constantly. Other arrangement would be more complicated and larger than the tapered fit.
One arguement against never sieze is that the film could flow out over time and cause the joint to loosen.
I think I'll just follow the instructions and fight through the problems if I keep the car long enough to change them again.
1984 300D Euro