If you value your belief that’s there are no ghost then it’s irrational to be scared by ghosts.
Are you talking about “real” ghosts? You shouldn’t be afraid of real ghosts because they don’t exist, not because you value your belief that there are no ghosts. Why should beliefs have any value for you beyond their accuracy?
No, rationality is about winning. Having certain values isn’t irrational.
If you value your belief that’s there are no ghost then it’s irrational to be scared by ghosts.
The relationship of most of us to democracy is different. We generally do value it and think the rituals of democracy are valuable for our society.
Are you talking about “real” ghosts? You shouldn’t be afraid of real ghosts because they don’t exist, not because you value your belief that there are no ghosts. Why should beliefs have any value for you beyond their accuracy?