This kind of thing is why I absolutely ****ing detest smug assholes who reflexively blame the misfortunes of others on 'their own stupidity'. Everybody makes these mistakes, and insulting people when they do and acting like you're above the failings of the human condition is an incredibly immature and self-important way to behave. (I'm tempted to name names here because the people who do this do not have the basic introspective ability to realise this applies to them, but that would be derailing things too far.)
E: "In hyperthermia cases, he believes, the parents are demonized for much the same reasons. "We are vulnerable, but we don't want to be reminded of that. We want to believe that the world is understandable and controllable and unthreatening, that if we follow the rules, we'll be okay. So, when this kind of thing happens to other people, we need to put them in a different category from us. We don't want to resemble them, and the fact that we might is too terrifying to deal with. So, they have to be monsters.""