Although that is a fair argument on one level it does tend to equate to the old: "Keep a tight grip on Nurse for fear of something Worse." i.e. an argument based on fear of what *might* happen. That didn't work for preventing Brexit. Hence if that's your comparison you'll need a different line of attack.
The reality is now, I suspect, that so many Scots are sick of being ruled by Tories (of all rosette colours) 'down south' that they may simply decide being pissed about by the EU is worth being rid of Tory-rule ad infinitum. And prefer Hope to Fear as a basis for deciding.
And every trip up here by BloJo or his chums simply makes the wish to be rid of his ilk stronger.
If the LP in Scotland hadn't forced itself back into a time-warp where Blairism 'Triangulation' still rules, they might have broken that. But they've done the same reverse-ferrit as down South.
So, with reluctance, I suspect Scotland's mindest will continue towards wanting Independence. And much as I have my doubts, I'd now prefer Scotland to be back in the EU. So if the UK bars that, I suspect the wish to leave the UK will grow.