“Objective just means it’s true”. No it doesn’t. How do you even define “truth”? How do I know that I am not the only real person and that all of u r NPCs? How do I know that I am not in a simulation? Now, discussing about the simulation hypothesis is dumb, as it is unscientific in nature. It is not testable.

What is true can be established only when it goes through the scientific method. Hence, an “objective” statement is that statement that would be agreed upon using the scientific method by a certain consensus.

Morality is not testable. Hence, the scientific method cannot be used here. Hence, it can never be objective.