My grandparents made a cookbook for all their children, and it was full of microwaved recipes and dumping jars of processed foods together. I looked into remaking it with better bindings as it was falling apart, but the recipes are all so gross. So I feel like part of it is generational, that we can get good ingredients, and value high quality food more than before. As much as people hate on blue apron, they kinda proved there's a demand for it, even if its not a viable price point.
The other thing wrt television... old cooking shows were boring. Throw in a dose of reality tv, make it exciting, and people will watch. It's also one of the few tv shows where a person could pretty reasonably recreate it, probably simplified, within their own home.