I don't have a lot of experience carrying bodies but I don't see many pictures of two or more people carrying bodies face down. It does happen but for the most part, bodies in the pictures I see being moved are face up.
No, it is obvious you don't have much experience carrying bodies at all. It is easier to carry a body face down. Arms fold easier forward, not backwards, as do legs. The are intended to fold forward, not backwards. Arms and legs are stiff backwards and flop forward. Arms and legs lock when tried to be pulled backwards making it much easier to carry for fewer people. Sorry, again, this has been concluded by some of the most experienced and expert forensic pathologists in the world. Why not listen and learn something instead of looking for objections?