>> Consider that our brains are the only organ on the planet that is able to understand the concept of life, reason about itself and all other life around it, understand the concept of evolution, and even conceptualize time billion of years into the past and future.
Here is where words like "narcissism" tend to land. It isn't personal against yourself, so please don't take offence. It is a philosophical viewpoint that is often stated, but appears to lack evidence. I don't have any counter evidence, but I strongly suspect it to be factually incorrect. And I believe the burden of proof is on those making this claim.
Further, even if we allow the above claim to pertain, this position makes the strong assertion that the very qualities that modern humans are uniquely superior in, are the very things that must be held uniquely special. To some of us, this just seems circular and too convenient.
Is it more likely that humans hold such characteristics to be the epitome of success because there is some objective model of success to which we alone conform (e.g. conceptualisation)? Or because it merely suits us to do so? I believe the latter, though you may disagree.