Micah 6:8 is not a slogan for nice people. It is God's answer to a worshiper trying to buy him off, and it calls for covenant loyalty worked out in ordinary conduct.

Micah 6:8 turns the question of what God wants away from bargaining and toward a whole life: doing what is just, loving mercy, and walking humbly with God. It is a requirement, not an optional extra.

Micah 6:8 answers the question of what God requires with a way of life rather than a longer list of offerings. God has already shown what is good: justice, mercy, and a humble walk with him.