Some comments about the cables and the upright posts and the wooden cross pieces. There may be some readers here who haven't seen them, and may be wondering how the system can still be used by people when part of it is "broken". It's not like a ladder with a broken rung.
The Cables:
The cables are thick steel ones than run for a hundred feet or so, and then are anchored to big eyebolts in the rock. Eyebolts come in pairs a few feet apart, so that there is an overlap where one piece ends and another begins. This results in what are effectively two very long cables an arms length apart.
The Posts:
At intervals of ten or twenty feet, there a large holes drilled vertically into the granite. Posts are set in these. At the top of the posts, they have a holes through which the cable passes, so that as the cables expand with temperature or have their tension change due to people pulling on them, the cables can slide through the post tops. This way, the cables produce only a mostly vertical force on the posts. It's like having expansion joints on a bridge; you have to allow for the cables to change in length and tension. The purpose of a post is to keep the cables at a convenient height for gripping. Also, you can rest for a while by placing your foot on the uphill side of a post and stand there more or less comfortably, depending on your footwear. If you are in sneakers or light hiking shoes, it is more likely to be uncomfortable.
There is a tradeoff in choosing the height to make a post. If it's too long, short people can't comfortably reach the cable. If it's too short, a tall person can easily lift a post out of its hole. Since the post is threaded on the cable, it isn't lost. It can slide down to the next post or eyebolt, and will stay there until some nice person takes it back up and sets it in the hole. This isn't ordinarily a problem. Even tall people when descending normally keep a downward force on the cable. There are a couple of places, though, where the exfoliating granite causes a downward step perpendicular to the rock surface. Just before the step, the cable is closer to the rock than below it, and it is more likely that someone will pull the cable far enough away from the rock at that point that they pull a post out of its hole.
Again, not a serious problem. The cable still works fine, and you can still descend it easily. But, obviously, the next people can't now stand against that post to rest until someone puts it back. They will have to use the equivalent post on the other cable, or descend to the next pair to rest.
The Crosspieces:
Posts come in pairs, one on each cable, so you can lay a board between them for people to rest on more easily. They aren't actually necessary, since standing against the post works too, but they are better for some footwear and for people who insist on holding onto both cables. Each board has a pair of pipe straps to keep it from sliding off to the side. These don't grip the pipe tightly. They just keep keep the boards in place against the uphill side of each post. If you lift a post out of its hole, that side of the board is now detached. If you lift them both out, you'll lose the board. It happens. Mostly we rely on people to be sensible. Also, the wood is in a terrible environment, so these boards can split or have straps pull off. There are often one or two of the crosspieces missing along the route. In good weather this is just a place to be more careful.
Groups of people on the cables often work out their own "best way" of descending. Soon, the whole group takes this as gospel. Facing up, facing down, both hands above, both hands below, one of each with the cable across the chest, one of each with the cable running across the back "under the armpits", etc. Actually, changing between one or another helps reduce fatigue. The actual best depends on your strength, the quality of your footwear, the quality of your gloves (if any) and the weather.
The point of all this is that the witnesses who were close to the victim were extolling the armpits method. This normally means sinking down against the cable, not standing up so as to pull the cable as high as you can. Otherwise, you can start pulling posts out of their sockets. If too much of this is going on, pretty soon there will be missing crosspieces and several posts piled up at one place. If the footing is already marginal and hands are half frozen, things can go very badly when the next guy gets there....
Again, it sounds like conditions were the real culprit this time. By the way, if you are at all worried about this sort of thing, carrying a pair of slings around your waist and clipped to the cables will absolutely prevent these accidents. (Two, so that while you are unclipping around a post, you are still always clipped in. The worst that can happen is that you will slide down to the next post. It can be slower, but so what? On a busy Saturday, you will spend most of your time standing a post anyway, waiting for someone to stop resting on the next one, and in that case it won't slow you down at all. This would certainly have prevented the recent death.
Also, when the cables are "down" for the winter, they aren't. The cables can't be removed. All that has happened is that the posts have been pulled out, so the cables rest against the rock surface. This minimizes ice damage in the winter, which is still bad enough to be a problem. It also keeps the tourists off the icy rock.