Broke 90 only last month, and carded an 87 yesterday in the Club Lady captains prize to men.
Bogey golf mostly with two nice birdies.
Played in no different manner than normal, the shots just worked, bounces in my favour and putts dropped. I've Never had so many single putts ! On fire. Left the driver in the bag mostly which kept me safe
Roll on breaking 80 now
By that criteria, Tiger from 2013-today and Phil are also head cases. Many great players battle two way misses and blow up holes at certain times in their careers.
Some of his nervous ticks and fidgetiness might support your argument but the above does not.