You can run drills all day long, day after day, and you will produce a hunting, obedience, agility or whatever other kind of dog you're interested in producing. It's not until you understand why you're running them and what effect they, and any subsequent corrections or praise, have on your dog that you start to really become a trainer. Plugging along from Point A to Point B and beyond will build a foundation for your hunting dog. It's vitally important that your dog have that foundation to build upon, and it's also one of the biggest problems amateurs have with training.
We get excited to "get to the fun stuff" and skip all the small steps that teach a dog to correctly carry out that fun stuff. When someone says their dog doesn't do something correctly or only does X, Y or Z incorrectly, you can almost always bet that the issue was caused by glossing over or altogether skipping a step in their foundation.
However, just plugging along and running drills, exercises, obedience and applying praise, corrections and the like in a more or less ordered sense isn't what it's all about ...