You are correct that I was a bit sloppy with terminology, but the point is it is not a user failure, but a failure in design. If your users consistently fail

You are correct that I was a bit sloppy with terminology, but the point is it is not a user failure, but a failure in design. If your users consistently fail to execute an action with your product correctly, it is a failure of the product, not the user. You can mitigate sometimes with training, but if a better design is available, that's usually the best course.