I wouldn't say that because while it's certainly possible to still get in the playoffs mix without playing in the SECCG, I wouldn't want to take my chances on it. While playing in the SECCG and winning it would be a virtual playoff lock for an SEC West team this year, I still just don't see the committee putting a second team in that didn't make the title game. It would pretty much take a perfect storm of all other options having 2+ losses and the 2nd place SECW team only having one loss.
Edited to add: I still say that there will already be talk of expanding the playoffs to 8 teams within a matter of weeks. It would allow each of the Power 5 conference champs to have an automatic bid and then 3 at large picks.