I'm a traditionalist when it comes to guns. IMO, unless the gun is going to live in a safe all the time, it's going to be a home defense weapon simply because it's accessible ....
The salesman is dead on. Earlier you said she had mastered the Glock but unless she can clear a jam or work the action, she hasn't truly mastered it yet. This is why a recommended a revolver to you. It's good she's decided to learn the action. I had a similar issue with my wife and now she knows what to do.
The panic right now is ridiculous. I've been able to find 9mm and .45 but I cannot find bulk .223 right now. I have not been shopping yet for a new weapon but have heard similar stories of empty shelves. It's silly. None of these gun bills have a chance at passing the House and there's an argument to be made they wont pass the Senate either.