helped you and everyone else in overcoming every single moral conundrum
It's a useful tool in making moral decisions.
If I'm understanding so far... The value of the tool is it helps you make morally right decisions.
Wouldn't you still have to have some other measure of "morally right" in order to judge the value and effectiveness of the tool in achieving it??
Nope.
The Golden Rule suffices. It cannot be reduced further.
If another was needed, that would supersede the Golden Rule.
Main point: No "side-features" that need to be ignored so as to use, a-la 1 Samuel 15:3