"Deep Survival" is a great read, and indeed does help us understand why we do the things we do. I especially appreciated the "vacation state of mind" that brings to us lapses in our judgment. From what I read of the story on this good man's memorial service, it sounds as though he was a bit of a rebel and rule breaker, sailing under bridges because he could and having the sailing club officials come chasing after him.
The question that's been asked here of why he wasn't coming down Lions Head is answered by the fact that they had planned to go skiing. Not hiking. The conditions weren't good for them to be skiing so they decided to hike up the bowl instead.
Although "experienced," did they have the gear experienced people would have to be where they were? Had they climbed too high, not realizing how much easier it was to hike up than it would be for them to get back down safely?
I know I've seen folks hiking up there during the Tucks ski season who had to be rescued because they had kept going up then realized they were in an unsafe situation and called for help.
I do not want to sound heartless. This was a horrible accident that happened to a good man who was doing good things in his life. Yet, really, he seemed to like to be on the edge of things and had other close encounters. The story about his memorial said he would do a thing first and then apologize later if wrong. That line of thinking doesn't always work out.
I'm sure his life ended too early for anyone who knew him and that the hole he left is a huge one.