I guess it depends on why someone is killing the animal. Personally I am doing it because I like elk meat.So I go for a double lung. I can't see wasting half an elk. If the elk is about to fall off in some God awful canyon or jump over a private fence,I guess that would be a reason.
I think guides and outfitters tell their clients to do it because they don't want long tracking jobs and time is money to to them .
But that is my 2 cents worth and probably worth a lot less
