Think about it. If you eliminated the “offside rule” in Fussball then the whole team would just gather around the goal waiting for the ball to head it in. It would be just one corner kick after another.
There is a reason for the offside rule to keep the game flowing and moving.
Meanwhile American football is rapidly becoming flag or touch football with endless waits between plays, standing around, huddles, reviews, insipid commentary . . . .
Being played more and more by feral thugs.
Then the smaller (5m?) rectangle can be made golie's zone with players excluded from entering.