Maybe some will do it once and quit. I know myself I'll continue doing it until I'm personally satisfied with how my character is in terms of quality. You may have a point that Blizzard put this 'Ordos Scale Cloak' in to keep people in LFR, but if that's the case then they really messed it up. You can't have a questline be 'optional' for all content, and then at the last minute make it 'mandatory' to complete to see a piece of content.
But I agree. When I realized that a LFR ToT staff weapon would still be more powerful than a Sha-gemmed and upgraded LFR staff weapon, then it greatly, greatly diminishes the appeal of the questline. That's Blizzards fault.