Very Cool! I think when he was describing his spookiness in the beginning he meant that it was beneficial for a large, lanky horse to be so aware of where his body was at all times. Not so much spooky as just sensitive and not dull and clumsy.
Not sure how a 'spooky nature' would help a horse though...
Well he explained exactly why it helps....because the horse is aware of their body, aware of their surroundings...the last thing you want is a dull horse out CC, recipe for disaster.
Also, some riders do prefer less-confident horses, as if you can create a bond with them and get them checking in with you, then they will do almost anything for you as long as you tell them okay. Me, I prefer an asshole who says "yeah yeah, I've got this lady."