I just watched this.
I don't think the people who like chicken gizzards (and count me among them) are interested in being a vegetarian.
Those who haven't had some good fried chicken gizzards shouldn't be so quick to dismiss them. They are like chicken livers, without the livery taste. That's a win as far as I am concerned.
While KFC quit selling livers and gizzards, for the most part, years ago, you can still get fine ones at Lee's Famous Recipe Friend Chicken. Lee Cummings was Harlan Sanders's nephew and president of KFC when the colonel sold the business, so he knew something about chicken parts.