{ 1 } - will be useful and relatively uncontroversial among philosophers of different perspectives.
{ 2 } - it justifies from a view on the foundations of ethics that it takes to be the correct view.

This is the goal.

Just as formal logic gives principles that are relatively uncontroversial (even though their foundation is controversial) -- so too formal ethics tries to give principles that are relatively uncontroversial (even though their foundation is controversial).