There is no practical benefit to have independence, they already have almost everything that they can ask. What they have is not just some sort of autonomy, its one heck of an autonomy.
At this point what they want is based on a nationalistic feeling and is emotionally charged, that's all.
That's right
It's more about their nationalistic/ethnic feelings/history/tensions than economically based reasons, as they already have a lot of autonomy.