I guess it would make sense that at a kiddush where egg salad was served, there would be herring left over. There was a story about someone asking a related shaila to R Elyashiv.
I find the egg salad at a kiddush much more disturbing, and I personally do not enjoy herring.
However, I see that millions of people enjoy herring very much. I am not arrogant enough to thus say that it is the “nastiest food ever invented”, because I personally do not enjoy it.
BTW, is “baal” tashchis a new avodah zorah?