The other part of it too is, if you kick away and the Bills drive down the field and score you've lost 4-8 mins of game time and have no chance to come back from a three score deficit.
If the Bills are going to score on that possession, you want them to do it as quickly as possible to preserve time.
Campbell could have managed his TO's better and had a minute - 90secs left when they tried the second inside kick as well.