There is also the "Quad 1 issue", which is not all of those games are equal. For example, 7 of Clemson's Quad 1 losses came against top 21 teams in NET. Our loss to Syracuse was a Q1 loss, but the win was not a Q1 win.
Our NET is a reflection of that aspect, IMO. If we are left out for any of those above, the committee is clearly saying that NET is not that important, and they are giving a win vs. #5 the same weight as a win at #75.