Probably right.
They ask for Zelensky’s removal. That’s an item that likely can’t happen until they continue their advance further.
Their other demands are what they are, but it is the Zelensky removal demand that won’t happen. Zelensky won’t resign, regardless of military situation. Vance has this right.
Clueless Pit Bull makes another naive assumption: that Putin wants to end the war. Putin does not, but if he can, expand it.