I don't think that following the primal benefit would be a good estimation for intelligence, despite the fact that such behavior is common for most species.
What makes human specie special is the ability of some individuals to create new things that didn't exist before. That's a loose criteria of course, because most individuals just follow educated social constructs for their entire life.
Oh yes I agree on that. I should have specified that I was arguing their ability to reason - which from my own experience these birds do most definitely possess to a surprising extend. They are smart, and they have all day to figure out which buttons to press to get you to do something specific they find funny or other such things.
What makes human specie special is the ability of some individuals to create new things that didn't exist before. That's a loose criteria of course, because most individuals just follow educated social constructs for their entire life.