If we use Christian logic, then the class is the roll you're meant to play; not the one you WILL play. Due to free will, you won't always choose it. Great and wise men started off good, only to fall later in life in the Bible. Seeing as how the [Paladin] class is here, they are likely true heroes. The [Hero] class may just be a generic "hero" like Hercules and Peach Boy; not like how paladins are meant to mimic Archangel Michel and Jesus.