We're not talking accuracy here are we Chris...more like blind bale (or 12yds max) shooting just to break the habit.
Yep, you got it. This is not a long term grip as the side pressure from your knuckle is not good for accuracy. As you say this is done to break the habit by getting the fingers behind the front of the riser so you cannot "grab" at the bow. You have to really try to concentrate on not squeezing the grip, just let it roll away at the shot.

Chris