I feel like this attitude (which is very common) holds us back from developing more reliable systems. When something fails, we don't ask what we can do to improve the system.. instead we point the blame at users. It's the easy way out.. instead of designing better systems, we just tell the user to 'do better next time'.

The more difficult a system is to use properly, the more we should demand an alternative. If your users keep making the same mistake over and over again, then at some point you have to start asking yourself what you need to improve.