If doing what you think is right makes you a fool, then embrace being a fool in someone's eyes. Thats being brave. There are no moral absolutes because morality keeps changing. Be as aware and as informed as you can be, otherwise, you have little basis for your own morality. Again, morality is in the eyes of the beholder. How else can you justify the moral abominations that god himself performed in the bible. Or that our lauded founding fathers baked into the constitution?I’d argue that in a world with no moral absolutes that there would be no injustice. And the person who fought against the imagined injustice would be a fool.
Being able to handle and empathize with someone, makes you able to see the world through their eyes. That empathy is a key component to morality. Because again, morality aint absolute. Your finite experience shapes yours.