Because when a fan touches a ball in the field of play, it’s a dead ball. There is no video or photo showing that Betts’ glove crossed the invisible, extended plane of the outfield fence. All the video and photo evidence shows that it did not. It also shows that two or three fans reached into the field of play to try and catch the ball. True. There was no “the latter” on this play. Mookie, his glove, the ball and the fans’ hands were all in the field of play. Watch it again. Betts’s body was one to two feet away from the wall at the moment of contact between glove, hands and ball. After the ball deflects his body continues to move then bangs into the wall. His arm is extended upwards at a slight angle. Unless his left arm is four feet long, his glove was still in the field of play. It’s even more obvious if you look at the fans. Three of them are reaching into the field.