You can also learn lessons from close calls where something almost blows up and nobody dies horribly.
S'also that weird thing they've been having luck with where you learn to keep doing good things instead of stop doing bad ones. Positive reenforcement, I think they're calling it. It's like learning
without suffering, as amazing as that apparently seems to some people. There's the occasional fellow that just can't seem to wrap their head around the general concept of, "Holy shit that went well, let's do it again!"
I hear* it's actually
real damn effective on non-human animals, too. Better than most alternatives, even, in at the very least the long run (and usually in the short, too). Turns out you're a lot less likely to end up with a dog that bites when you're
not occasionally beating it when it does something stupid, and instead encouraging it when it does something smart, just as an example. Weird stuff.
*And by hear, I mean I was an idiot child that believed you'd get better results out of occasionally swatting an animal you're trying to train at the appropriate time rather than
not. You don't. Basically ever! Odd how that works out, it's almost like pairing a lesson with fear, pain, or suffering in general can teach the wrong lessons or dilute the ones you're aiming for.