I don't understand, though. You make the point that the user needs to read about the machine, but the very fact that the user needs to read about the machine points to bad design. A well-designed machine wouldn't have called a mode that user more energy and more water "eco".
I didn’t say that the machine was well designed. I said exactly the opposite! The very fact that it is not well designed means that you cannot rely on your intuition when operating the machine. If you do not have some idea of how the machine operates then you will operate it badly. In the specific case the video examines, operating it badly means blindly operating it in the default mode when a different mode demonstrably works better.
I agree, but telling an overworked parent because their dishes are dirty because they didn't take the time to deeply understand the mechanism of their appliance doesn't tend to go down well.
If a machine doesn’t function correctly or well, then fixing it requires blaming some part of the system that can change for the better. The dishwasher cannot change; it’s just a machine. It could be replaced, but that might be expensive. Much cheaper for the operator to change what buttons they press on the dishwasher instead.
If that requires reading a manual, or carefully timing the actual length of each wash cycle, or making a recording of each of those wash cycles so that you can work out how long they fill for and how many pre-washes and rinses that they each do then so be it.
