I thought it was generally accepted that the brain needs time to recover and assimilate all the input it received during the day, and that process is likely a m

I thought it was generally accepted that the brain needs time to recover and assimilate all the input it received during the day, and that process is likely a major factor in dreams. Supporting this is the fact that smarter animals need more sleep than simpler ones and younger brains need more sleep than older ones. Any actual brain scientists can confirm whether I'm just regurgitating folk knowledge or not?