I understand that anxiety can be crippling for some, and should be dealt with on a case by case basis. Almost everybody has SOME anxiety for racing, but it is a healthy amount for most. Most people will become more resilient for facing their fears and tackling an obstacle.
I wonder if she said it turned out to be beneficial to go through the trials and prelims at least. It could have been what she needed to help her succeed through those rounds the next time through. Some people just need to get through something once before they can be their best self in it the next time.
Very reasonable speculation. I would just take her word for it and mosey on, but your take is pretty good!