As I pointed out on the thread about noticing when you're rationalizing

You can find multiple, independent considerations to support almost any course of action. The warning sign is when you don't find points against a course of action. There are almost always multiple points both for and against any course of action you may be considering.

If the hypothetical is structured so as to eliminate most courses of action, it has probably been purposely framed that way. Hypotheticals are intended to illuminate potential choices, if all but one choice has been eliminated, it is a biased alternative (loaded question).

Note that this is one reason I like considering fiction in ethical (and political theory, which is basically ethics writ large) reasoning - the scenarios are much simpler and more explicit than real world ones, but richer and less likely to be biased pbilosophically than scenarios designed for that purpose.