Well humans have the ability to be objective about what's often considered subjective. Objective subjectivity. If a person examines their desires, motivations, and intentions objectively they will come across moral facts about values, and virtues. They'll come to know that honesty has moral worth, and deceit is dangerous. They'll come to know that murder is robbing innocent life. They might arrive at the consideration of what's deserved and things that are undeserving. We all make value judgments, and all value judgments bring about outcomes that are either beneficial, neutral, or damaging to those involved, and at large beyond that.
Actions, or inactions both tell a moral story. We have the ability to assess those things if we are objectively about the truth of those things as we deserve to know it.
People come to realize there is a price to pay for acting falsely toward honest motives. Society pays a price.
Actions, and inactions can often reveal character. And the integrity of society depends upon honest dealings. So it becomes necessary to protect the public, and private honesty, and to defend against malicious falsehoods, and bad dealings.
Moral empiricism is about the study of our own motives and actions and the results of those things and how they affect society.
People lose sight of the value of truthfulness, and accountability. People think that they have no accountability to society. They use their moral relativism to cheat, deceive, and lie as it seems to suit themselves without taking into account the larger consequences.
People come to realize there is a common good, and a right to private good through moral empiricism. People come to realize what's a human right, and what is not.
Everyone employs moral empiricism; the study of motives, desires, actions, inactions and the results they give to not only themselves but to society.
So there's a truth about these things that can't be avoided. If society has the wrong values then everybody pays. So moral empiricism is vitally important.