I see. The water in the desert example. What do you mean ‘should’ (moral term) v

I see. The water in the desert example.

What do you mean ‘should’ (moral term) vs ‘prefer’ or ‘can’ (empirical term).
Do you know the difference between a social-political good and a personal preference?
Should=Would my relatives retaliate?
vs
Can, Useful, Preferable = Yes?