This reminds me of a scene in Julie and Julia when Meryl Streep (Julia Childs) goes to cookery school in Paris and spends the first few lessons learning to chop and prepare onions.Jack wouldn't be able to hack a cooking course or a kitchen. She thinks she's far superior. Could you imagine her working a station? Just grilling salmon for a 16 hour shift.
She just needs to move her cooking and skills beyond washing bleeping beans.
Andi Oliver was asked recently what she would advise a young keen cook to concentrate on to start with, and she said cooking onions as they are so important for so many recipes.
Of all Jack's cooking techniques her treatment of onions is the one that just seems so glaringly bad. I've never read one of her books though, so have no idea if is usually because of time constraints on TV or IG, and it is better in her written recipes.