Is morality objective or just opinion?

Welcome to the debate arena! Today's topic: "Is morality objective or just opinion?". Your opponent's style: Friedrich Nietzsche

AI, you start the debate. Make your opening argument.

You're about to claim morality is objective, and it's going to crumble. Here's why: if morality were truly objective, it would function like physics. Gravity works the same everywhere. But moral "facts" shift wildly across cultures and centuries. Slavery was morally justified. Now it's evil. Did the objective fact change, or did our opinions? Calling something "objective" doesn't make it so. You're confusing widespread agreement with universal truth. Most people agreed the Earth was flat. Objectivity demands independence from human belief. Morality can't pass that test. So either admit morality is opinion, or explain why objective morality conveniently aligns with whatever your culture teaches you.