Isn't the loss of objectivity just a result of the question having more degrees of freedom than it does constraints, and the subjectivity just comes from picking which constraints to assume? Doesn't a well defined goal turn that question into a positive question?
A simpler example could be, "is it better for me to build a bridge over a highway out of cardboard or out of steel?"
It's superficially normative but becomes a positive question as soon as you define the constraint that a bridge that no one needlessly dies while walking across is better than one that kills people.
At that point all of these questions become scientifically approachable, although some are likely still hopelessly complex, as soon as you assume an axiom like, "it is best to maximize the ratio of well being over conscious suffering."
What that axiom should actually be is likely a nearly unapproachably complex amalgamation of philosophy, but it seems more reasonable to work with something than assume that there is no right answer, especially when we seem to be rapidly approaching the point of needing to have software systems make quick ethical decisions.