Not sure why this got removed from 196lemmy..blahaj.zone but it would be real nice if moderation on Lemmy gave you some sort of notification of what you did wrong. Like an automatic DM or something
Patrick here is meant to represent most people who lean towards moral relativism but haven't thought it through. In their daily lives they think that certain things are obviously bad (e.g., chattel slavery) and they also think that we should work to better our society. But then they also think that there is no such thing as objective good and bad; morality is just relative to some group consensus.
But if moral relativism is true, then you can't say that slavery is universally bad; slavery was a morally acceptable action for the slave owners because they agreed that black people are inferior. Similarly, there is no motivation to work towards a "better" society, because what we have now is exactly as morally good as anything else we could agree on in the future. The objection is that moral relativism is incompatible with our conception of moral progress as an objective good.