Nonsense. Sorry, but that really is nonsense.
Judgment is not required.
Why would I require a completely objective measure of right and wrong? Even if I do, it's easily reasoned out.
In simple terms: there is enjoyment, and there is suffering. Enjoyment is right and good, and suffering is bad and wrong. Exactly what said enjoyment and suffering are may be open to debate around the edges, but no one will argue that the principles here are not correct.
A very simple moral code seeks to maximise enjoyment, and minimise suffering.
So long as you remember to consider that humans are social animals who function best as part of a group, that particular moral code is enough for almost all situations. There will always be fuzzy areas, but in any individual's life they're unlikely to hit ones it doesn't address.
My reason for not doing X where, let's say, X is killing someone who annoys me is not because I am afraid of getting caught - it is because there is an inherent dislike of murder instilled in me by evolution. Murder is bad because it weakens the group, it causes an increase in suffering and a decrease in enjoyment. I would avoid someone who annoys me rather than kill them.
Psychopaths follow the line of reasoning you specified, but they rather tend to miss out on the group angle of it - hence the problems.
I don't really need an objective measure of right and wrong. I have positive and negative feedback, which are much better, more situational, and far better for learning from than simply measuring up against a half-score of rules on a stone tablet.
For example, my method covers all the coofftopicndments quite happily - most of the actions they prohibit would cause negative feedback more than positive (except idol worshipping - go ahead on that one). It also covers much more complex, subtle situations like lending a friend money or buying them a drink when they're short. Doing so causes a better time for everyone, and is a minimal outlay of resources for me (i.e. requires little or no suffering for said increase in enjoyment).
I've kind of lost track now. It's been a long day so I apologise if the above is a bit rambley.