Well, if you don’t wake up, then you will be stuck in your dream, which you only have part control over. If that dream turns into a nightmare and you die, then you will either be stuck in eternal darkness until you die(in real life), or you will wake up somewhere else in your dream and feel the pain of that death. This will happen over and over again until you either wake up or die(in real life). Because you are stuck in a world you don’t have full control over, you will get used to letting your world control you, then once you wake up, you would’ve forgotten the most basic things, such as walking. Does that help?