What's in it for me? I agree that it should be more than just a, "Because you should know it."
Since I'm not currently in a typical classroom scenario, I'm going to consider how one of the faculty workshops I'll be delivering soon can be analyzed in this way... "What's in it for me" with faculty considered as our main attendees.
Workshop: Students as Developers
This isn't our official workshop description, but in this upcoming workshop, we will explore how students (past or present) can be used as developers. In current classes, how can your students be producing meaningful learning objects for others, or products that can become more than the traditional "throw away" assignment? Thinking of your GTAs and TAs, how can you use their student perspective to help students who may be struggling with specific concepts in the classroom? We will explore some ideas for how students can be used as developers, and then provide examples of success stories where institutions or faculty have already tried using students as developers.