There is "ZERO" doubt that CHF places more stress on entire sway bar system when suspension articulates the same amount. It's just an engineering fact.
By changing the leverage on sway bar with CHF, it twists the sway bar more for the same amount of wheel articulation, which is why it works. The sway bar in essence behaves like a thicker or stiffer sway bar. That's good news to reduce sway.
Under normal highway driving it's highly unlikely that a motorhome would sway enough to stress components enough to break anything. If there was enough sway to stress components, occupants would get motion sickness in short order.
If there is going to be a stress problem high enough to fatigue or break components over time it would likely be caused by driving the motorhome over uneven surfaces that forces significant suspension articulation. If you think about it, driving across a swale 3 or 4 inches deep at an angle is far worse than a motorhome swaying a little due to wind from passing trucks.
__________________
|