Again, horses with minor deviations from what is perceived to be ideal conformation for a particular discipline doesn't prevent them from excelling, providing all other desirable (and therefore, necessary) characteristics are present (such as heart, speed, willingness, etc.). That's not that difficult to understand. You can study the history of the racehorses and stock horses and see the various types of conformation of horses that have proven this to be true. The money-winning horses and progenitors in the different specialized disciplines today also prove they don't necessarily have to adhere to a perceived conformational standard or ideal to be called 'successful'.