It's worth making a distinction between proximate and non-proximate (or direct and indirect). The train crashing is a proximate disaster. The train helping to

It's worth making a distinction between proximate and non-proximate (or direct and indirect). The train crashing is a proximate disaster. The train helping to enable genocide in WW2 is non-proximate but still tied causally to the capabilities that trains open up. In both cases these are unintended consequences. Most of the dead bodies associated with technologies are non-proximate/indirect. The big disaster of nuclear physics wasn't the proximate Chernobyl it was the non-proximate invention of nukes and their spread. Oil spills vs climate change would be another example. The deep unknown of what a new tech opens up is what we should be worried about rather than knowable malfunctions. Once you draw the black ball you can't put it back.