Something is morally right if it fulfils the Correct Theory of Morality. I’m not claiming to have that.
Because of the above, I think you are making a claim that a singular Correct Theory of Morality exists. How would you explain that to a nine-year-old? That’s the discussion we could be having.
Imagine your nine-year-old interlocutor pointing out that not all children have the same Good Things and Naughty Things drummed into them.
So? You seem to think I am arguing for one particular theory.
Because of the above, I think you are making a claim that a singular Correct Theory of Morality exists. How would you explain that to a nine-year-old? That’s the discussion we could be having.