The problem is that it came out of left field. We know that Kal El was a genuinely good person who wanted to help but the movie never went out of it's way to show how much he valued human life
So saving people from impossible situations since you were 13 years old doesn't show how he values human life?
Being relentlessly attacked by Kryptionians but taking a moment to save a helpless solider who falls out of a helicopter doesn't show how he values human life?
Did we watch the same film?