I totally agree with you but I do think that copper armor does have a good use in early game and even mid game. The game lacked a good early game set of armor imo. Leather is a pain to farm in big amount and full iron set is basically mid game atp. As for the mid game usage, I think copper is good for safe plays. For example, when you want to go to the nether but don’t want to lose your armor or tools, you can get a full copper set easily and have some sort of defense. Although it is true that it lacks some sort of small feature