well in one case the team that benefits is the one who made the good play, and in the other case the one who benefits is the one who made the bad play.
If you merely get tackled, you are down there. But if you get tackled, and fumble the ball, if the ball happens to bounce in a a beneficial direction, you get the benefit of making a worse clay than if you had simply got and tackled. It makes no sense to me
I would say the other thing that is up there is automatic first downs. I can maybe see it any personal foul, but I hate how a defensive holding on 3rd and 17 is an automatic first down. it's a 10-yard penalty, so give them the 10 yd, and now it's third and seven