I agree, but...you still should draft the BPA and exercise discipline in regards to reaching.
Your post speaks to team building as much as anything. That being said, sure college talent is perhaps the main part of that, but free agency should not be overlooked. Zach Baun played a huge part in Philly's championship run. Howie Roseman knows how to build a team (including using free agency), and their scouting department knows how to spot talent.