First Contact. We can rescue Picard from the Borg, but we'll be danged if we even contemplate trying to find a way to rescue the crew members who have already been assimilated. And when all the assimilated crew members are dead, we return to the present with a big fat smile on our faces.
You nailed it dude. I call it R.H.I.P.T.N.G
That stands for Rank Has Its Privileges. on The Next Generation...
Or how else could Worf kill a dude in premaditated fashion, then go back to his post as if nothing happened. Or Picard (as Locutus) can kill 16,000 Federation citizens and just go back to his job as if nothing happened. Or how Riker can show much disrespect to a senior officer and just go back to his post with out even a slap on the wrist.
Rob