Why wouldn't they?I do get where you're coming from. I disagree on community spread being low for not needing it. Do you think once community spread is low that SeaWorld will drop their proof of vaccine? Or the Bills in Buffalo doing the same?
There's no value in proof of vaccine if spread is low enough. You don't provide proof of measles vaccine or negative TB test to do any of those things.
It would just be extra overhead at that point with very limited value. Much like shutting the school down one day a week to deep clean every surface has very limited value and should be stopped now.