That would mean that even such simple things as saw or a file are poorly designed (even if you understand the concept of sawing already: should you press down when you pull, push, or in both directions?). Rotary telephones too: it's easy to find recordings of people who are too young to have used them being presented with the problem of using one as a puzzle and finding it very unobvious.
I claim that most cases of devices that you know how to operated ahead of time are cases of devices that are so ubiquitous (or similar ones are) that everyone has been exposed to the required concepts by osmosis.