I think many people do not realize they encounter ethical dilemmas more often than they think. Magical thinking is involved.
Have you ever remained silent or done nothing while something inappropriate was going on, perhaps bullying, offensive comments or jokes, lying, backing up a buddy who is in the wrong, social media abuse, cheating, rule-breaking (serious kind)… I think back to my own high school days to the peer pressure and pack mentality that occasionally kicked in, and I was paralyzed, feeling bad about something going on but not wanting to be the one who broke from the group and risked being unpopular for objecting, and rationalizing my way out of feeling guilty. I wince still at memories of my less courageous self, though I comfort myself that all those mistakes and regrets for actions not taken have taught me how flawed a human I am and to be better by doing better.
Young people on the cusp of adulthood are eager to embrace all the privileges and pleasures of adulthood. Part of the deal is owning your actions and paying attention to your moral compass, recognizing lack of action is a decision in itself, and being willing to speak up for what is right.
Moral Dilemmas do not have to be movie-sized events. They can be small things, and writing about failure and what you have learned about your own human frailty can be an impactful, honest essay.