On a higher conceptual level, I agree with your premise in full. In this specific scenario, however, I don't think it applies. Let's imagine you want to teach

On a higher conceptual level, I agree with your premise in full. In this specific scenario, however, I don't think it applies. Let's imagine you want to teach your students a course on native mobile development. How would you do it without turning it into a "course on how to work with a specific commercial product", given that your only two relevant choices are Android and iOS, and both are commercial products?