their #1 fear isn't the rocket blowing up and getting killed, it's not fear of blacking out from G-forces, it's not fear of getting shot down, it's the fear of screwing up.
Same as the #1 fear from TFA. (fear of writing buggy code / messing up)
The official Pilot's Prayer (as handed to us by Alan Shepard) is "Lord, please don't let me fuck up".
Not "Lord, please don't let me blow up" or "Please keep me safe"
This is also the Stage Manager prayer.