You are getting sidetracked. My gripe is not about expansions, was about the idea of the “halachic dinner” being a seudas mitzvah of kedusha, tahara and talmud torah when really its just an excuse for people to satisfy their yetzer hara for exotic delicacies.
There is no such thing as a “Yetza Hora for exotic delacies” If its Kosher its Kosher and a Mitzvah to eat it, If its treif, then its an Averah to eat it. In the case of the Locusts, If your Rav or Mesorah hold its ok, then its a mitzvah to eat it and if not then an averiah to eat it.
ANyone can call anything an “Exotic delacy” Ive heard sushi called that by some