Every good guy thinks of themselves as the good guy. This is a given. They are doing the work of the gods, what they do is important.
The cool thing is, even the bad guys see themselves as the heros of their own personal story. Mao, Hitler, Stalin, all thought of themselves as the hero, standing up against all those other people, who didn’t believe in them.
The guy screaming at the convenience store clerk for not having enough coffee stirrers is the hero, and he sees himself as the righteous hero.
You see yourself as the hero in your personal story, as justified as that may be.