The Beef Wellington Dinner Dilemma: AITA For Not Inviting A Friend Who Only Eats Well Done Beef?

A home cook's dilemma over a fancy dinner for friends. It all started when Brandon, a friend, proposed to pay for the expensive ingredients of a viral dish, 'Beef Wellington,' and asked if the 35-year-old home cook could make it. The home cook agreed to make the dish for eight people, including Brandon and six guests. However, a few days before the dinner, one guest canceled. Two other guests proposed to bring along their mutual friend, Ava, who doesn't eat beef with any pink. The home cook refused the suggestion since the whole dish is cooked the same, and it's not possible to make a single portion well done. The home cook's reasoning was that it's not worth making a fancy dish that he himself wouldn't eat, just to accommodate the one guest, and it's not fair to cater to someone else other than Brandon, who's paying for the meal. However, the two guests are accusing the home cook of being unaccommodating and excluding Ava, and calling him an a**hole. What do you think? The comments section is waiting for your reaction.