But that's a cornerstone of the character, that's what Superman is. He's an alien with unrivaled strength, power and moral fiber. People forget that Superman is one of the oldest, most well known, and most revered comic book characters ever, and is a pop culture icon ahead of pretty much every other comic book hero, even ahead of characters like Batman and Spiderman.
The Snyder/Nolan film should rectify this part. The point of Superman originally, (before those horrible follow-up movies to the original) was that even though he was an alien and not human, he still had human failings and flaws. And from what's been seen so far, that's the theme that Man of Steel has taken.