> Yes, many economists use utility maximization in their analyses
This has nothing to do with economists; the Western legal system is (more or less) based on the weighing of different interests (definitionally: utilitarianism). There are, of course, a few exceptions -- which graze deontology, and even rarer still virtue ethics and (more historically) some divine command theory -- but overall, I'd say that yeah, we're pretty much utilitarian.
> There is a whole field of thought that digs into these variations.
This has nothing to do with economists; the Western legal system is (more or less) based on the weighing of different interests (definitionally: utilitarianism). There are, of course, a few exceptions -- which graze deontology, and even rarer still virtue ethics and (more historically) some divine command theory -- but overall, I'd say that yeah, we're pretty much utilitarian.
> There is a whole field of thought that digs into these variations.
Agreed, ethics is a rich and valuable field.