if you forget certain dreams/things because your brain deems them unimportant, then why do i sometimes have a dream that i want to remember and only remember later on when something comes up that reminds me of it?
dreams have issues with handles. they don't always have good handles to remember them by, because they are usually super disconnected from the normal world. so sometimes you wake up and you don't even know where the handles are, but they are there. like your bread box