Writers have already a set story-line (s) that has absolutely nothing to do with (or very, very little) what the fans want or wish for. You don't see Rachel and Jean interacting because it's some gross conspiracy against their fans... it's just not part of the set plot.
I can almost guarantee...No writer is sitting at their desk thinking..."hmmm...what exactly do the fans want and how do I write(force) that into a story?"