Unlike some of those other things that you mentioned, lucid dreaming actually does have some research and scientific backing behind it. Lucid dreaming is legitimately accepted among psychologists and is even used in therapy. I had a professor who told me so. She's a Ph.D (or M.D, which is a psychologist?)

An unlike some other things like telekinesis and ESP, it isn't all that difficult to imagine LDing. The dream is within your own mind and you mind creates awareness. Why couldn't they cross?