Entitlement. That is the answer for nearly every “why?” that is asked in the current day.
I know one. He sometimes supplements with fruit, but has gone for months at a time eating only raw meat. I’ve gone to food-oriented parties with him He doesn’t eat at social gatherings and eats his own food at home before or after.
I am a picky eater. Rules to live by. You won’t starve in the few hours the gathering takes. They’ll be able to give you plain water to drink. Everyone can drink water. If it’s a weekend event (any i just returned from a weekend event that had a whole meal i couldn’t do) then duck out briefly to eat something.
(I told the hostess i couldn’t eat that meal, in the hopes she could reduce the headcount, and it turned out they had already made accommodations for someone with a deadly allergy and i was able to get the same modified meal. But i didn’t plan to. I planned to just go to a restaurant and pick up a meal i could eat.)