Why not? What if an undefeated G5 team gets in and has to play Alabama? Wouldn't that be just as bad?
You're talking about a 1 in 1000 chance of something that may never happen. You had 2 cases this year of a team with 4 or 5 losses playing in a P5 CCG and neither came close to winning. But if they did, so what? Let them have their shot. I'm personally tired of a group of people deciding who is in the top 4 or top 12 with some subjective, ever changing criteria. Establish a clearly defined criteria for making it to the playoff and make sure everyone is aware. And if some 4 or 5 loss team, defies the odds and makes it, good for them.
i think we're being blinded by how lucky we've been during the actual playoffs to not have crazy upsets. it's worked out really well. but that's not true for most of cfb history. it's very unusual, actually.
since 2000, these conf champs would have muddied the cfp by winning conf titles (record are pre-bowl games):
2000 - 8-3 purdue (either 1 loss oregon st or va tech would have been left out, both won their bowls over top ranked teams)
2001 - 9-3 lsu (but this works out decent as no 1 loss or better gets left out, though the final rank #3 (uf) and 4 (tenn) teams both get left out, but had 2 losses pre-bowl)
2002 - 9-4 fsu (again, works out as no 1-loss pre bowl get left out, but final rank #4 (usc), #5 (ou), #6 (tex) and #7 (k st) all get left out)
2003 - 11-3 k st (works out again, but #4 osu gets left out with 2 losses)
2004 - 8-3 pitt (1 loss cal, 1 loss #6 louisville (not a p5 at time, but lone loss was by 3 to #3 miami), and undefeated boise st
2005 - 8-4 fsu (no 1 loss, but #4, 5 and 7 all get left out)
2006 - no one really, maybe 2 loss wake? but either 1-loss mich or wiscsonsin plus #3 lsu (2 losses) get left out.
2007 - lots of 2-loss teams in, but none egregious, but 2 of #2 uga, 1 loss kansas, and #4 mizz get left out.
2008 - 9-4 vt (this is the real fustercluck, choose 2 of 0-loss utah and boise, 1 loss bama, texas, and texas tech)
2009 - really clean, but still gotta pick between undefeated tcu or boise
2010 - 4 loss uconn (leave out either 1 loss mich st or stanford)
2011 - 3-loss clemson and wvu (leaving out either 1 loss bama or stanford)
2012 - 5 loss wisk (1 loss uf and oregon both get left out) (undefeated osu not eligible, stupid ncaa)
2013 - finally one works out perfect, no bad admissions and no bad omissions either.
2014 - another really clean year with no real arguments.
2015 - 3 in a row!
2016 - 4! crazy.
2017 - 5 - this can't be, but it is
2018 - 3-loss washington, leave out 2 of 2-loss uga, wash st, and mich. some snub, but not huge.
the last 5 or so years would have worked out really good for a 5+1+2, but going back any further and it gets disastrous most seasons with bad omissions.
point is it's not a 1 in 1000 chance. in fact, it's probably a >50% chance, we've just been really lucky the last few years that it would have worked out nicely.