Remember the movie Shawshank Redemption, it showed that when you've been sentenced in prison for a long time and years have passed, you become institutionalized and a prisoner would rather commit suicide then receive freedom. Prisoners simply cannot live in the free real world, if they do and try, they undergo incredible withdrawal pains.
Unfortunetely, most witnesses are institutionalized and simply cannot bear the thought of leaving. They have put way too many years and effort into the WT way of life and cannot fathom the thought that the WT and themselves just may be wrong.
Realizing that they've been supporting a false concept and that the WT is simply a successful billion $$$ business with millions of volunteers distributing literature is OUT OF THE QUESTION. They'd rather commit suicide then realize WT is not backed by God.
Serving God in Spirit and Truth means to witnesses: OBEY whatever WT Corp says, even if it's exactly the opposite of what Jesus really taught.
Better to Love, Live Laugh amigos, because in 50 years most of us won't be here, it'll go by in a blink.