Another aspect, and actually the reason I’m hearing for not using it, the kids have to be supervised. Uniform players ONLY are allowed in the extended zone. No team personnel, trainers, coaches, etc. With that in mind my guess is you have team boxes in part to contain the players and thus limit supervisors. I would also assume at some point those ringside seats were for sale. It would make sense to limit the team’s area. Purely a guess on my part.