1) It was not so easy for me to think that way but a conclusion I came to decades later. It was easy to know what happened to get me into a bad situation because I was the one making the decisions. I can not explain why god did what He did. Thinking the kid was just there is easy to do and that is what I thought, at the time. I never tryed to analyze it until relatively recently.
I did put this lesson to good use when I drove my car off a road. It was on a forestry road winding around the mountains. When I went off, I had a lot of thoughts , rather quickly. I knew that somewhere down that side of the mountain there was a couple of houses and I actually thought I could see a road below. I imagined I could just go straight down and get onto it. Of course there was no road and I could have run off a cliff or hit a big rock or something. I had a sudden realization that I had been here before (de ja vu?) and decided I had to keep all the elevation I had and to fight going down. I could try to stop as close to where I came off, as possible, and check it out on foot. The driver's side of the car was on the up hill side. I could not get out of my car without it rolling down. I had to stay seated and reach something (a jack) to jam under the back of the front tire. I took my dog's leash and tied the steering wheel to keep it from turning down-hill. I reached behind me and grabbed a rope from the back seat and tied one end to the window opening of my open door and the other end to a conveniently nearby, very small tree. This was a VW bug. I was able to get out and walk for help. In the morning I was able to get someone with a big 4wd to pull my car up onto the road.
So, while I was foolish to drive off the road (my generator quit and my lights dimmed out. I was driving under trees and when I came around the corner, I was in the open, looking straight into a full moon) I did learn something from that previous episode of foolishness. Which is, don't go down when it leads only to oblivion, in order to find a hypothetical path.
I normally never think about any of this stuff and writing about it forces me to deal with it, somehow. Same thing with the boy and the cliff story. I never analyzed it until recently and because of other experiences, I can see a certain pattern, and better come up with a possible agency behind them.
2) I do know other people die. In that particular case, of attempted mountain climbing; most people who die mountain climbing probably have some idea of what they are doing and make an informed decision to do something dangerous. Maybe God protects people who do not know better, I don't know. This is a serious question that there may not be a good answer for. My brother let this get to him and it practically drove him insane. He got to the point of thinking he should get killed somehow, while saving someone else. "you are a better man than me, Gunga Din". Well, that's not me. I have a limit and it has to do with the idea that I can not help people if I am dead.
That probably disqualifies me from being a good Christian, so that is not a reason for me being alive, while others are not.