They can't initiate the action or direct it, nor can they engage in the ceremonial greeting or sign-off. Even so, it's better than the game show's pink-collar ghetto. The audience at home during the day tended to be female, and the thinking was, they didn't necessarily want to watch another woman hosting a show. They wanted to look at a man. Except this is now.
Producers tend to cast in their own image.
Which brings us back to Anne Robinson. Martindale prefers not to pass judgment on Robinson. Betty was the female version of Regis. The host should add to the flow of the game. That's what Regis does.