Re: I'm confused
For a couple of centuries after the widespread adoption of the printing press, 'social norms' involved burning unpopular women as witches.
I'm sure if you think about it, it won't take long for you to find other examples in history of social norms being different to our own.
So it would appear that conforming to social norms is not in itself a route to goodness.
Arguments based upon first principles, on the other hand, I can attempt to engage in. Whilst trying to avoid the hubris of believing that I'm not shaped by the social norms that went before me. That why Matt Groening and Kurt Vonnegut identify with the Unitarians.