This reminds me of a video by ReeceJones on YouTube, really interesting if you have time to watch it: Lucid Dreaming: Dream or Reality? (Part One) - YouTube

The thing is, the only "real" there is, is something that we as humans can't comprehend. Our brains aren't wired to experience true reality, only our own, subjective realities. Therefore, dreams can't be any less real to us than waking life is.