I don't think the goal is correct. In fact, I think the implementation should reflect the user's mental model. The closer the correspondence between the implementation's model and the user model, the less likely are surprises, bugs and limitations.

There's also the aspects of form follows function, and mechanical sympathy. The use of a tool should strongly guide its shape and design, and similarly, a user should be able to develop an intuition about what the tool is good for and what it's not good for, so they can use it to maximum effectiveness, and not be frustrated when it can't cope with a problem it's not designed for.