Hypotheticals from a hypocrite
There's a lot of blame at a time like this, there are the classic armchair critics saying that what happened was stupid, like they've never cut a corner or taken a risk. (Quite possible for the TR tough guys out there). We all say 'check your knot', wear a helmet, and all of the rest, and in most cases I'm an advocate of this. I'm also likely to solo across a ledge, unclip my safety to deal with a tangle on my anchor, and not use an autoblock to save a few minutes, and in summer I regularly choose to mitigate the certainty of sunburn rather than the possibility of rockfall. In this case, the more details that came out, the more I went from "FFS, A simul-rapping accident on a big wall with no knots?" to "I can see a way for this to happen" using a logical train of occurrences and decisions that most pragmatic, and not risk-averse climbers could understand if not agree with. I've done all of these things, I've seen this behavior