Okay, I'll add to it - lots of vehicles are both comfortable and heavy and manage to not run through control arm bushings every 50-60k miles. That part is either under-engineered or poorly made, plain and simple. I'm not crapping on the vehicle, I love them. I wouldn't have two if that weren't true. But there's no valid defense for that one screw-up.
Examples?
The old man's Yukon Denali is heavy but has nowhere near the ride quality of the LR4 despite the magnetic shocks.