“ . . . utilitarianism considers either the interests of all humanity and/or all sentient beings equally. Proponents of utilitarianism have disagreed on a number of issues, such as whether actions should be chosen based on their likely results (act utilitarianism), or whether agents should conform to rules that maximize utility (rule utilitarianism). . . ”
Yes, we certainly can make ethics complicated. When I took a college class in ethics way back in 1986, it was taught by a professor in the philosophy department.
And the bulk of the class seemed to be about finding dilemmas, often very fanciful “dilemmas,” regarding . . .
Human Rights vs. Human Welfare
Immanuel Kant vs. John Stuart Mill
Even though in the real world there’s a heck of a lot of overlap between human welfare (or well-being) and human rights. And a good course of action will often find a way to achieve a good chunk of both.