Eating a burger with shit in it will likely kill you. Should I have said cyanide instead to get the point across? The point is that there are some burgers that are clearly worse than others (use your own imagination if cyanide doesn't work for you), just as there are certain actions that are clearly morally worse than others.
I can't help it of you don't understand the concept of an analogy. The form of this one is good X:bad X::good Y:bad Y. We're not dealing with GRE-level stuff here.
> Eating a burger with shit in it will likely kill you.
Preferences for death or risk of death are not exactly unknown, so, while that may be true, it isn't sufficient to establish the universal preference you've offered it to support.
> Should I have said cyanide instead to get the point across?
No, for the same reason. The problem isn't the example, the problem is that the point is wrong; whether or not one believes that an absolute morality exists (in whatever sense of "exists" makes sense for morality), you aren't going to any of its contents through universally-extent preferences, just as you won't for food, because preferences aren't universals.
