Arbitrary and biased are value judgments.
And they’ree built into rationality.
Whether more than one non-contradictory value system exists is the topic of the conversation, isn’t it?
Non contradictoriness probably isn’t a sufficient condition for truth.
Well, that justifies moral realism.
...or its an emergent feature, or they can update into something that works that way. You are tacitly assuming that you clipper is barely an AI at all...that is just has certain functions it performs blindly because its built that way. But a supersmart, uper-rational clipper has to be able to update. By hypothesis, clippers have certain functionalities walled off from update. People are messilly designed and unlikely to work that way. So are likely AIs and aliens.
Only rational agents, not all mindful agents, will have what it takes to derive objective moral truths. They don’t need to converge on all their values to converge on all their moral truths, because ratioanity can tell you that a moral claim is true even if it is not in your (other) interests. Individuals can value rationality, and that valuation can override other valuations.
Only rational agents, not all mindful agents, will have what it takes to derive objective moral truths. The further claim that agents will be motivated to do derive moral truths., and to act on them, requires a further criterion. Morality is about regulating behaviour in a society, So only social rational agents will have motivation to update. Again, they do not have to converge on values beyond the shared value of sociality.