Certainly, it may not always lead to human-level intelligence, but that it has done so should also not be surprising. But to conclude from such a thing that this is what evolution does is badly mistaken. The ant is a far more successful organism than man, and it is in my opinion, as far as walking creatures go, the real pinnacle of evolution. For what evolution really does is produce an increase in survival capability, or more correctly, 'maximum reproductive success'. In those simple terms, the ant beats mankind, hands down.
Man is a bulky, inefficient quirk by comparison with the ant.
Intelligence only wins, it is only 'cultivated', when it actually increases reproductive success. The existence and persistence of the stupidest creature on earth proves the point. For the virus is indeed the pinnacle of evolution, when all creatures are compared. The virus is the most rapidly evolving organism on Earth, it is the most robust, the most pervasive, and the most invincible. And above all, any given species of virus that is alive today is far younger than the genome of mankind, and therefore it is the only true end-product in the history of evolution.