Is the fear of irrational fears rational?

[Dropship]

The definition of fear is:
an unpleasant emotion caused by the threat of danger, pain, or harm.
Fear becomes irrational when their is no actual but perceived danger, pain or harm.
So is the fear of irrational fear a rational or irrational fear?
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Well my late mother and her sister were always highly strung, as if they had a dread that some unseen thing was out to get them, but they had a good innings and lived into their 70's , thyroid complications eventually killed my mother, and a heart attack killed her sister.so they spent their whole lives living in fear for no reason.
Me, I'm just the opposite, I don't give a rat's rear what punches life might throw at me, so why worry about it..
But then I've got christian values, which undoubtedly help me achieve the right mindset.
Sadly, people without spiritual values are like wagons without springs, jolted by every pebble on the road..