None of the pieces falling into their places within Superman canon were done naturally. There wasn't any natural character progression to the point of becoming hero, love interest, or villain. Everything that happened was because Clark was coerced into it, told it's how it's gotta be 'cause it's in a comic book, or saw the future and accepted it. He was never written as a character who can plausibly pull off Superman. He was afraid of heights for 10 seasons for Pete's sake.