I appreciate the value of cater wrapping for transport purposes and I'm glad to learn that it's a real process.
As a veteran of more catered workplace meals than I care to admit, we always figured the catering staff either suffered from a special "plastic-film-OCD" or wanted us to WORK for our lunch as those plates and platters were devilish to unwrap without something sharper than the plastic utensils provided.
Not a method I want to use for anything that's staying in my house!