Not sure it's that simple. He drafted defenders in the first and second rounds --- Freeney, Jackson, Morris, Sanders, Hayden, Angerer, etc. --- i just think he realized that with Manning, our offense was always, rightly, going to be our strength. And so, he drafted Edge, Dallas, Reggie, Addai, etc.
we should also recognize that if Luck is healthy, offense should be our strength. that doesn't mean ignore defense, it means project and protect your strength.