It's funny when someone tries to act as an authority on a subject that they don't understand. Tell me, why do we sleep? I bet you can't, because no one knows for sure. There are many theories as to why we need sleep, but there is no definitive answer. Ironically, the most definitive answer we have for why we sleep is "because we are tired." Again, there are many competing theories on he subject (off the top of my head... one theory states that we sleep to collate visual stimuli,, among several other interesting ideas).<quoted text>. Your opening up a can of worms here.
You seriously don't get it.
Firstly you need to understand why we have to go to sleep (and don't say because we are tired ).
Secondly you need to understand what is happening to us when we are asleep.
And lastly you need to understand why we arise after sleep.
P.s everybody and I mean everybody dreams, there are many states of dreaming and everybody does it, regardless if they remember their dreams or not, everybody dreams while sleeping.
I have a solid understanding of what happens when we sleep. Do you?
Yeah, no shit everyone dreams.