"totally free" would be incorrect.
MUCH MUCH MUCH less likely however is a fact. Not only on hips, but working breeds are healthier all around. If you don't accept it, that's fine...keep your head in the sand. However, you asked for the facts, and I gave you a link that correlates the frequency of several disorders to various breeds. Funny however how the breeds that do the best are also breeds that were developed not from show, but from working origins.