Not true... I've "upgraded" to the Lucky8 hd lower control arms with poly bushings not too long ago. While out on an easy trail the RH LCA broke at the front bushing, the axle popped out of the cv joint on the engine side, and bent the airbag/strut deeming it completely useless. Luckily, I ran my smaller 31" tires that day and the SYA saved my A$$. I couldn't imagine the damage it would have done with my 33s.
And fyi, I've been on bump stops while on the move with my 33s and the SYA kit saved me from causing some damage.
I also have individual schrader valves for each corner as an emergency backup along with the xlifter and gap. So, being overly prepared is a good thing.