The pampered youthful (as they have been taught to believeclass which has only ever known a Britain inside the EU judges all things my a single measuring rod: economic well-being.
As their bellies are full solely because we are members of the EU, and would otherwise be empty (as they have been taught to believe and forbidden to question), then it follows that if you want a full belly you must remain in the EU, and national autonomy is a small price to pay for that privilege. In fact, now they come to think of it, national autonomy is a rather nasty right-wing thing which we're well rid of.
Now if we were to restate this argument, but replace the EU with the UK, and the UK with Scotland, would they argue the same? We know that they would not. Paradox or what? No problem, mate, in a world where women have penises and there are thirty sexes what's a little more mental confusion. Like the Queen of Hearts they can imagine ten impossible things before breakfast. The real experts far more than that.