It's not useful if you're just imagining examples. I would prefer a test of a hypothesis through experimentation, but where that is not possible, at least a reference to actual events, and not imagined ones that "could" happen. Otherwise, there will always be yet more counterexamples.
Why is physical experimentation privileged over any other sort of test? How can you have a physical experiment on proper moral behaviour? proper human rights? laws? truth tables? the existence of
a priori knowledge? How is a reference to actual events useful? Example:
Hedonistic utilitarianism believes that good is a matter of aggregate pleasure subtracted by aggregate pain. A primary objection to this is the problem of distributive justice. Imagine we have four people (a, b, c, d) and two situations (1, 2) each person received a degree of pleasure a(x):
1. a(1), b(1), c(1), d(1) = total of four
2. a(2), b(2), c(2), d(-2) = total of four
The utilitarian would say that these are equally acceptable, but this conflicts with the intuitive appeal of fairness.
Looking for a real world reply: Bob was once person d, for situation 1, 2, therefore there is nothing wrong here. Hooray what a useful real world reply! Think of all the problems we could solve this way. It's like we could solve centuries of philosophical problems with this genuine insight!
Fundamentally, how can we refer to actual occurrences when the question is: 'what should happen here?'
We're not even discussing other major areas of philosophy such as logic, epistemology and metaphysics which might lead to some key insights on your part.
This is not a landmark discovery. What I am citing is old news. I skipped a lot but it's all widely available.
So you're not going to explain how the series of premises you listed is valid, much less sound? So you yourself have no idea how the argument you cited against nominal ethics actually proves anything, much less if it is true? Why should anyone waste any more time trying to convince you of anything when you only respond with non sequiturs and don't pay attention to the arguments that everyone is making?