Their whole thing was that Scottish independence was a good thing, but it wouldn't be possible (or even a good idea) because Scotland wouldn't be able to support their economy on their own. Does that response hold water?
As a disclaimer we are U.S. citizens, and I definitely don't know much about Scotland, so feel free to dump whatever information on me that you want
There's a good argument to be made that the EU wouldn't let Scotland in because it would embolden other potential breakaway states like Catalonia.
But they also might do it out of spite towards the UK, so who knows?