I must agree. Instincts is far more important than training. Training is good and necessary. I can train a dog to do many things. But if a dog is more genetically prone to do a specific job it will be better suited to do that job especially with training. 

If you want to hunt get a dog that was bred to hunt. If you need a retriever get a do the is bred to retrieve. If you need a guardian the best dog to use is a dog that is a guardian nature.