It's important to point out here that what you're reading about is people being tortured to confess on the purpose of a watch.
The logic of "Interrogators smelled a rat" is terrifying. Imagine you get captured by a state enemy and they ask you why so many Americans have iPhones. They beat you until you tell them and clearly "uh, they're useful? everyone has one? you can pay for them in installments so the cost is hidden?" aren't going to be acceptable answers. The interrogator smells a "rat" and wants to get the "real" answers from you.
Clearly the answers of "so we can do Muslim things" are to appease the interrogator. The prisoner knows that "I don't know, cause everyone else has one and they're cheap" is not going to fly.