Doesn't seem excessive to me - that's the fixed stud on the RHS rear end of the swingarm rght? The specified assembly procedure for these bearings reflects BMW's expected service life of the components i.e. 100k+ miles before replacement or attention, with happy, unconcerned owners. That'll be the reason why they put that killer threadlock everywhere.
OTOH, if you're an owner who regularly spanners the bike, tweaking and checking stuff much more regularly - spline-lubing for example, there's no need to aim for monster attention-free service lives. When I put the rear end together on a K, I know that I'll probs be taking it apart again for some reason within a couple of years, and my normal level of attention to the bike would spot any issues anyway. Consider also that the assembly procedure for the LHS pivots (front and rear) will assume that new bearings have been fitted, whereas adjusting up a non-new bearing is, in my opinion, much better done by feel. I don't use threadlock, or a torque wrench on those pivots either. OTOH I do use a torque wrench on caliper mounting bolts, because otherwise I'd have a tendency to overtighten them which, with the female threads only being aluminium, would eventually weaken them. Okay, I'm waffling.