The breakaway cable issue has been cussed and discussed ever since it was invented (which wasn't all that long ago!) There are those who (like me) don't want that braking system activated unless/until the towed vehicle is completely disconnected from the towing vehicle, because we do not believe the "safety" cables or chains are strong enough to hold the shock of a braking vehicle, and we don't want that vehicle suddenly stopping in the midst of rush hour traffic!
Then there are those who believe that the cables or chains are quite obviously strong enough to handle whatever abuse is handed to them. Also, of course, the attaching points are strong enough to handle anything, as well. The idea of their vehicle suddenly coming to a stop in heavy traffic when the cables/chains/attaching points fail is not a worry.
We all have choices.