I already illustrated how this could easily be the case in a few years. Point remains, you or anyone else projecting Yurov as a can't miss 1C is not enough of a reason to go out and trade Rossi if you otherwise like what Rossi brings. Hence why, if Rossi is traded, it will be because Guerin no longer values what he brings over what the return would bring.
It's the same logic behind why we don't trade Eriksson Ek just because we want to project Yurov as a 1C. We like Ek's game, he's important to the future of this team. If Rossi had the same level of importance, and Guerin liked his game just as much, he would be given a long term deal, and not traded, as well. If Guerin didn't like what Ek brought to the team and didn't see it fitting here long term, Ek would have been traded.
Not really the same situation for a multitude of reasons