The landing gear is only part of the way the Cirrus manages those impact forces. Admittedly, the Cirrus models have a lot of room for improvement but is still better at managing vertical impact loads than about 95% of GA aircraft. The seats have an energy absorbing module for example. It's better to have a spinal fracture (which most of the sort we are talking about tend to be stable and many don't injure the cord) than to have no chance at survival at all.The ballistic chute alone is only a partial solution. When the plane hits the ground at 16'/sec, a standard rate, something has to decelerate the plane so that the occupant doesn't suffer a spinal compression fracture. Cirrus have a reinforced landing gear for that purpose. But if you come down over water, the landing gear won't help.
There are good images of what this module looks like after an impact, into water no less, available on the docket management system of the NTSB. Look for the fatal crash of N91MB at Indianapolis in 2006 and find the survival factors report. I would provide the file directly but I happen to have been friends with the pilot who died in this crash and would prefer not to have dig it out of my archive for emotional reasons. If you cannot find it, let me know and I will post it.
EDIT: RiggerRob pointed out much the same thing.....sorry Rob, didn't see your post before I commented.