Remember the story that came out a month or 2 ago about that woman who had an emotional support hamster that was not allowed on her flight, and it was said that airline officials even told her to flush it if she needed to make the flight but it wouldn't be allowed on?
I'm not sure if that's what inspired Chrissy Teigen to do this or not, but she pretty much owned airlines without realizing it when she successfully flew with her "emotional support casserole." I don't know if it's because she's a celebrity or not, but she literally had ZERO issue with flying with her casserole, which poked holes in the emotional support animal flying regulations.
(I get it's different since an animal can get loose and a casserole can't, but what if the container fell and the food spilled out, which caused someone with food allergies to react? Not all that different now, is it?)