That is possible. The term is a bit of a blanket name for any case in which a normal part of the system is cut off from the rest of the psyche. The cases in which I'm referring are specifically dealing with Emotional Detachment and Narcissistic Personality Disorder.
Namely, those cases in which grover's step #2 simply doesn't work, and it causes great functional problems in life. Much higher risk of criminal behavior (in particular in violent ways), increased chance of addiction, self-involvment to the detriment of personal relationships, etc, etc.
This means they don't have morality not that there isn't a universal morality.
But if they don't have it, then it isn't Universal, is it? I'd accept "very common", though.
In toher words just because some people can't recognise right from wrong doesn't mean there is no right and wrong. Or am I wrong?
What about the common morality quizes? "You see a train full of 25 elderly people heading toward a baby sitting on the tracks. There is a switch in front of you that will divert the train away from the baby, but right into a brick wall. Not switching the tracks will certainly cause the baby to be killed, but switching them will certainly kill everyone on-board the train."
Then what about the two common alternates to that question: "Swap the baby for an overwieght, middle-aged man" and "The train is heading towards the baby, but you are on a bridge overlooking the scene; standing next to the large middle-aged man. In order to save the baby, you have to push the man off the bridge into the path of the train - his wieght will stop it, but the impact will kill him and possibly some people on the trian."
Studies show that people tend to apt for saving the baby in version 1, letting the middle-aged guy die in version 2, and letting the baby die in version 3.
What does that say about a universal morality?