I am agnostic on Seperation (it is not for me to say), but even so I don't think it is high enough of a probability right now for anyone to base their vote on it.
What about after "right now"?
At what point should those supporters who support their economic and other political positions, but not another referendum, pull the plug? And what would that look like?
A party getting 30% or 40% electoral support suddenly gets 12% because now "they're too close"?
What is the point in supporting a party that promises to do something you don't want, solely because for the time being they're in no position to fulfil that promise? I'm not asking this because I want QS to fail, nor because I want their electoral opponents to succeed, but it's just not making sense.
It's like saying "vote Conservative for now, because they're on the ropes, but if they start to build momentum (as a result of your vote!) and might be able to roll back reproductive rights, stop supporting them THEN.