Very simple, the majority of the NT writings are not applicable to the great crowd according to JW theology. (Remember they were writtin for THEIR instruction) It is up to the ruling party to decide which scriptures pertain to great crowd and the potential converts. That is why the pet scriptures are reiterated so much in the pubications. There's countless scriptures that you just will not see because they conflict with current dogma. As a diversion the writing dept. has been good about creating all those antitypical parallels from the OT that Jesus and the apostles just couldn't figure out for themselves or forgot to tell us 8&> Gal. 1:8,9 says it all.
Allen