Morality, Law, and Prophets

Hello,

I read your words about the distinction between law and morality.
But seemingly, the very fact that the prophets present the demands of justice and compassion as “God’s will” shows that there is a fundamental connection between morality and law.
then:
How can it be said that morality and halakha are two separate levels?
Shouldn’t morality be seen as an inseparable part of halakha, only that the prophets mention it when it is forgotten?
Or do you think these are really two different systems, which only occasionally overlap?

I would appreciate clarification on how I should understand the exact relationship between them.