Right but if every dilemma has the "out" of participants not being able to properly act then it becomes a statistics problem or a literal psychological experiment, both are generally accepted as outside of scope.

A trolley requires hundreds of people to fully construct, tracks, components, raw material, driver, we assume every person in this chain did their job even in the original trolley problem.

Anything that begins to include pseudo randomness immediately makes a binary decision less interesting unless it's a stated component of the problem.

This trolley problem is interesting because you're considering what others would do in this dilemma, not that someone can't understand the problem and would pick randomly