Care to cite these studies claiming human brains are intrinsically superior? The primary difference among mammals is the size and fold density. Koalas are famously smooth-brained, but other animals have greater memory and reasoning capability with larger, deeper folds. What they lack is language. Humans developed superior vocal cords, allowing great variation in speech patterns that jump started written language and, by effect, written history. Have you not seen the videos and reports of the incredible communication and logical capabilities of other animals such as dogs learning 300 commands and using 40+ speech buttons? Have you not heard the tales of octopus escape artists defeating locks?

Survival is what your parents and local community can teach you. But innovation and invention? You are the product of thousands of years of written language passing on more information than any single person could remember and more then any single community could develop on its own. The biggest brain in the world would sound like an idiot without language. We are not above animals, we just talk like we are.