The Scots as a whole voted to stay in the UK.
The UK as a whole subsequently voted to exit the EU.
If the Scots didn’t like the rules or want to be in the UK club, they had the chance to say so in 2014.
Title of this discussion sums it up. We appear have adults stating the game needs to be started again because they lost.
The Scottish Ref. was based on a premise where the UK was in the EU. The goalposts have been moved.
I don’t want Scotland to be independent, but I think they are within their rights to demand one due to the severe change of the circumstances.
On the losing thing: No, it’s because the referendum result was not clear enough to make one viewpoint dominant over the other, especially as the leave campaign was primarily based on lies and baseless nationalistic rhetoric. Even many leave voters have publicly said they regret their decision.