Sometimes it works out that way- it has for me in the past. The trick is definitely to not become stuck because of whatever misfortune befell us- but- that's easier said than done.
Other endings to that story could have been that the king was so shaken up by that experience of initially injuring his finger that he never went out hunting again and avoided the future encounter with the barbaric tribe that way. That plays into depression though and wouldn't suit the story. That would have been a nicer ending for whatever future animals he would have stalked down and butchered though.
I think in some religions, those who are sacrificed go straight to heaven. The king could well have had other vices in life asides from killing animals for sport. Maybe he was already marked for hell and that sacrifice would have delivered him to heaven. There are all sorts of endings possible... Some good, some bad.
Sure, it's kind of great if you can take life in your stride. It's bound to keep you more on an even keel. I personally think it's important to express emotions though. Telling yourself that it could end up being a good thing that you were assaulted, bereaved, bullied, injured doesn't always allow a person to process what's happened. To me- it's like white washing paint over a crumbling wall. Eventually, the paint will crack and peel off and all that trauma will still be there.
So- I'd say it's a balance. I think it's important to acknowledge when something has upset us but at the same time, when we're ready, we can decide that it won't impact us negatively forever. Maybe it will turn out to shape us into better people.
I think plenty of people working in supporting others have experienced trauma in their own lives. They try and turn that bad experience into something good. Others end up inflicting the same pain on other people: 'People who hurt, hurt' type of thing.
Neither of those things are passive though. The person kind of went along with how to process that trauma. Plus, the very worst criminals out there maybe don't see their trauma as a bad thing either. If they enjoy being sadistic and get away with it, they may not regret the 'bad' things that made them that way either! So, it's not always a happy ending if you embrace all the bad shit that happened to you in my view.
If your employer is negligent and tells you to climb up badly maintained scaffolding and it collapses and you break your spine- you sue right? You don't just accept it as a useful learning experience! If it was a crazed serial killer that captured and maimed the king rather than an accident- again- you'd expect him to have the killer found and arrested before they hurt someone else. Maybe that doesn't impact how we view misfortunes in our lives but at the same time, if something's unjust or unsafe- it's important to realise that and put it right. Not just accept it passively.
Really though, I just see it as a tool, coping mechanism or cheat or whatever to try and cope with the shit in our lives. Whether that will even be worth it in the long run- who knows?!! Maybe the king one day will have wished he'd been sacrificed! The Aztecs used to give their sacrifice victims dynamite drugs before they went out. Maybe his sacrifice would have been quick and in a state of euphoria. Maybe he ended up taking a month to die of sepsis after injuring more body parts in future hunts with his doctor telling him it could go either way all the time.