I understand where you are coming from, but not all of the available sites have the ability of hosting all classes. And even if they physically are able to, they may not want to commit to hosting a larger class of games.
Sure, SMSU in Marshall could host a 6A game. But should they...
I would agree it would be optimal.
But host sites need to coordinate workers, concessions, logistics, and security, among other things for a state playoff game. Many schools cannot or will not be able to do that, especially on a week's notice-- when their school is not participating in the...