Offer instead the most direct and natural control possible. Don't perform this second task in a vacuum. The most direct and natural approach is dependent not only on the task, but on the profile of your users. Mimic the safety, smoothness, and consistency of the natural landscape. Don't trap users into a single path through a service, but do offer them a line of least resistance.
People explore in ways beyond navigation.
Sometimes they want to find out what would happen if they carried out some potentially dangerous action. Sometimes they don't want to find out, but they do anyway by accident. Needless to say, this slows people down. In the absence of such dialogs, people slow down even further. A study a few years back showed that people in a hazardous environment make no more mistakes than people in a supportive and more visually obvious environment, but they worked a lot slower and a lot more carefully to avoid making errors.