I love this philosophy. Playoffs are a direct test against the best. When you fail, you see where they were better than you and you try to shore that up so that next year that won't be the reason. Depending on situations (needs, availability, money) you can fix in-house, via trade, FA, or the draft.
2 years ago, we lost to Houston cause we lost our composure, and we settled for FGs instead of TDs. So the fixes were leadership and experience along with improving the weapons on offense.
To me this year's loss to KC showed areas of concern on both sides of the ball. Our D couldn't stop their playmakers and our O couldn't keep up (and again we lost composure in the process). And the one thing this approach doesn't address, at least to the naked eye, is coaching. How could the coaching be improved to alter the outcome?