When was the last time Nigel Slater had a prime time cooking show? Same with Tom Kerridge although he is on that British cook off show (which I hate)
I cannot abide Marcus Waring either but he is all over the place
I suppose the difference in trained chefs (not sure that includes Nige) is that this is their career. She was a reality TV show contestant who got lucky and good for her, but tons of the bake off contestents didnt have a TV show, they're doing cooky stuff in the background, Nancy Birtwhistle springs to mind for example and who is that one who fronts the junior bake off? Cant remember his name, young man.
But largely, TV and radio and film and music are fickle and often people just have their time and arent seen much any more. Doesnt mean she cant do her job, just not on the telly.