Nobody panics when things go "according to plan." Even if the plan is horrifying! If, tomorrow, I tell you that, like, you'll walk through a graveyard, or a morgue, nobody panics, because it's all "part of the plan". But when I bring ONE corpse to a job interview, well then everyone loses their minds!

I think the corpse acceptability must also account for whether the person expects a corpse to be present.

People are often uncomfortable in graveyards and, for example, would not want to walk through one at night when they would be willing to walk through a field.

The dirt does provide a sort of insulation however, as people would be more willing to walk through a graveyard than through a house that had the same density of corpses in the basement. It's the theoretical accessibility to the corpse that plays a factor here.