I empathize with women in their high heels so I'll be there in my kilt and T-shirt and I'll walk around all day just to prove that if I can wear the shoes for 36 hours then certainly our customer can wear them.
I mean, if you are directing actors to do one thing and then directing them to do something else entirely because the one thing you wanted them to do may not work, then you are just shattering their confidence in the project.