That's easy to say when you don't know what other things may be bound to that code. As said, I have worked on similar stuff before, and was in a very similar situation where an audio device was kept open for longer than necessary, but "simply closing the device" would have broken many other things that depended on the audio device. Fixing it involved logic changes and refactoring. Sure it wasn't impossible, but it was not exactly as trivial as adding a new checkbox either.