I read the Kept Catholic term as talented people underperforming in order to maintain an image that plays to a lower common denominator, like Oirish America, when they are capable of much better.
With the breadth of stuff they cover there’s bound to be good and bad. It can’t all be above average. As I noted above, their studio stuff is pretty good. It’s when they get in front of a camera or live audience that it degenerates into an element of paddy whackery in order to help create a visual spectacle, and that was one part of what KB was commenting on.