HoChiMinh, believe it or not, the JW writers are trying to substitute the word "non-witness" because the "worldly" were offended by being described that way. The "worldly" viewed it as a judgmental perjorative. At the assemblies and conventions, the speakers and people giving demonstrations are carefully coached to avoid that word---worldly. Recent WTs and KMs will more likely use "non-witness."
Of course, word "worldly" keeps spewing out of the mouths of the rank and file because they have read for so long and heard it from the platform for so long.