Share 'Leakage to outside on ducts fully within the envelope'

I am just wondering if a lot of people are feeling the way I do on the subject of testing Duct Leakage To Outside on duct systems that are fully within the envelope.  And the way I feel is - it's completely pointless, any reading you get is just an inaccuracy of the testing method, not the actual leakage to outside, which is 0. For some reason some major programs (I don't want to point fingers, b…