It is so unnecessary and fairly persuasive; unsuccessfully, insistingly imposing the audience there is a great mystery going on but weak fiction just causes a perception of a confusing and boring movie in you. Full of very irritating logical errors, incoherence and lack of intelligence.

Categorically, this kind of movies are not science fiction, they are action movies because there is no science going on in them.

By the way, there's no mystery about dreaming, your brain is just rearranging the randomly recorded data during the day; defragmenting them according to their relations and deleting the unnecessary ones.