I think this speaks to the failure of utilitarianism, at least in my mind - notions of "utility" are rooted in subjectivity and subject to chaotic forces in the future. Utilitarianism still remains useful as an ethical and executive framework, but one must be easily preempted by other ethical concerns as in the article, as well as aware of the inherent uncertainty in future outcomes.
Utility is subjective? We have instincts around what to consider useful or not. These instincts have been calibrated by evolution for survival. Survival is pretty objective, don't you agree?
In spite of that, not everyone has the same instincts on what is useful or not. Therefore utility is subjective. Beyond survival there is much else to disagree about.
