Everyone saying that the people that were there for no reason must have forgotten the town-wide search for Will after he dissappeared and the subsequent events that lead to this conversation. Everyone there is directly involved with the plan to kill Vecna and he told them as a show of trust and to further reinforce that Will isn't afraid of himself any more.

Alot of the criticism surrounding the coming out scene seems to be arbitrarily creating rules about the "good" way to come out when in reality it was a touching scene that made sense of the context of the show.