In Grand Theft Auto games (especially those made up to that point) you can keep playing after the end, and killing John conflicted with that. There was the possibility of not killing John at all, but Cantamessa didn't think it would work. The story needed to go somewhere, and John's death was where it needed to

Featuring a wool-lined, long coat with custom, hand-tooled leather accents, a leather vest with ornate pattern details, stand wing-tip collar with black neckerchief, and custom ornate buckle with matching boot tips, the Grizzlies Outlaw Outfit pays homage to the "boss" of the Northern States, its real-world inspiration.

Whether wanting to play in third-person as RDR2 is presented or taking the plunge and playing entirely in first-person, Red Dead Redemption 2 beginner guide|https://reddeadstation.com/ Dead Redemption 2 is sure to be fun. It just might be more fun playing entirely through the eyes of Arthur.