WRONG. I can tell you now that not ONE of my horses could jump an olympic height showjump course no matter how well trained they were. My Arab could NEVER be successful in WP no matter how well trained. My stockhorse could NEVER do well in an open hack class no matter how well trained. Most sprint bred TB's could NEVER bury their *** in the sand after a cow like a QH cutter.ANY horse can do ANYTHING if trained the correct way.
Conformation and mind DEFINATELY matter.
If your statement was true, then there would be NO point of having individual breeds.
That is the most ignorant statement I have ever heard.