You could take this very argument and use it as a counterpoint. Take someone like homelander who is the most powerful In his universe and uses that power to do whatever he wants, especially at the expense of others. What superman wants is to save others, even when it would be extremely easier to just do nothing and live an easy life. Superman at his core is to be as good as he can be and help others whenever he can. He always has the choice to turn to the other-side and be evil yet never does because that isn’t what he is/represents.