Plus I generally dislike the idea and feel like its a trend that should go away.
Isn't that where domain expertise comes in? It sounds pretty sensible and important to me to try to imagine various realistic failure modes and preemptively try to prevent them. To not let the website go down, pre-empting hard drive failure or DDoS makes a lot more sense than worrying about network cables spontaneously disintegrating, or the outbreak of nuclear war.
Edit: I'm not downplaying the importance of prevention
Seems to me that bugs is then a high risk in that project. And to prevent or reduce the number of failures, the project needs an auto test suite