When you get a lot of turnovers, it is tough to rack up a ton of yards.
It's like playing NCAA FB on easy mode, where your offense hardly ever sees the field because you are returning kicks, interceptions and fumbles for TDs, then giving them back the ball. You get a safety, return the kick for a TD, and get the 2 pt conversion, that's 10 points, with zero yards of offense. If you do get the ball, it is inside the red zone and you score on your first play. It's not unheard of to have more points than yards.