In a sense when u dream isn't it so said that ur brain is perhaps releasing subconscious worries etc. in a sense isn't taking control of a dream and then reshaping it sort of perhaps not letting ur brain do its job. The contrary side to this is that dreaming could be a sort of forgotten aspect of our cultures. maybe dreaming is meant to be more controlled but now days it just does its own thing because no one knows how to harness it? (except for lucid dreamers)