That seems fine by me. I have Scottish friends who are split on the issue. I believe all nations should be independent, that’s why we have nations. But if they would want to be part of the EU more than part of the UK, so be it. I would think it would be pretty difficult however.
I too support secession as a general principle, but solo-Scotland is not a viable entity. And they’re only pursuing a means to remain in the EU, which is not independence.