Presumably, those states have a higher value they’ll accept for normal. This is a failing of the federal government to set a national policy goal. Biden should be the one to set an acceptable goal for the nation. Then states could argue if they want a higher spread goal.
If talking about an acceptable level of death and other long term impacts is uncomfortable, they should just set a vaccinated goal, high enough to get the desired outcome. Again, a federal goal would set a floor states could argue around, along with the metric. Instead of some using “adults” and others “population”.
States removing mitigations without stating a goal are saying the current level is the goal by omission. It’s sneaky and magical thinking that it’s better than the stats show (for most states).