I think there is something to this, but what we are seeing is scandal after scandal involving TV chef/presenters. It has undermined the genre to the extent that many broadcasters are now wondering whether it hasn’t run its course. There are lots of chef/presenters [male and female] for who the work has now dried up.
Famous chefs’ restaurants are struggling and closing, the CoL means people are looking for cheap affordable cooking tips, WLI mean that people are less inclined to bake/cook as much now. I think ‘Food Porn’, as my DH calls it, no longer pulls the audience in in the same way it once did and that audience is more expert/less naive now after decades of these shows. I think it is less about her sex/faith and more about the trend. She has done well for a average Jo off the street who won a TV cookery show. She either needs to reinvent herself or accept that the bubble has deflated, if not burst, and not impose an intersectional discrimination lens on this. It won’t help her.