There’s warning in the sense that “it can happen.” There was a moderate issued with a significant severe chance. For a tornado, that means there’s a 15% chance of a tornado within 25 miles of a given point, and a 10% chance (or more) that the tornado will be EF2 or higher (strong to intense). For an area that big, there were almost certainly going to be tornadoes, including 1 or 2 significant tornadoes. Question then becomes where do they happen? In this case, they fit pretty neatly in the moderate area aside from whatever shakes out of Florence, AL. That was the enhanced area. As others have said, not everyone has access to a shelter. In my case, I watched a movie while it did whatever it was going to do.

Tl;Dr: there’s warning in the sense of “it’s going to happen somewhere and it’s probably going to be strong or intense in an area or two. There is no “it’s going to happen HERE; it’s going to be THIS INTENSE.”