You can see the joke here. But, as with all good jokes, there's a lot of truth here.
Let's assume the B1G sits. Now we've got four of the five playoff participating conferences. Is the national title winner, assuming there is a playoff, a true national champion?
Okay, let's say the B1G and PAC are both out. Now we're looking at the Big 12, the SEC, and the ACC. Do they go with three of five for the fall playoff?
Let's take it a step farther. Let's say the B1G and PAC delay their start until the spring. Do we have a three conference playoff, with a fourth invite, then playing the spring playoff winners? Can you see a team winning a playoff in January, only to have to face the other playoff winner in June?
If we don't see some agreement or unification between the conferences we are going to be looking at the 2020 season with no national title winner.
Even if we see a Bama team go undefeated, and that team is the only undefeated team in college football, any recognition of a "title," other than SEC, is going to be scoffed at worse than 1941.
Be prepared to live, or relive in some situations, a season a lot like 1966.