I raised the issue because it occurred to me while reading, but...
Okay. That works.
+Pretty sure the Prime Directive doesn't apply to the slave race of a warp capable species.
=I'm guessing the difference here is the cat's out of the bag already. Even if they were pre-warp, the Romulans made first contact. Therefore they have knowledge of offworld life, are part of galactic civilization, and (at least in the Federation's mind) the Romulans have an obligation to help evacuate them as subjects (if not citizens) of the Romulan Empire.
Okay. That works.