The article writer is has younger children, though. For older children the ability to set a daily time limit makes sense based on what research I've seen, and (if you, parent, would like) it could skip the helicoptering and invasiveness: kid gets x hours per day to do what they'd like, and then they need to find other things to do. My oldest is only four, so I haven't begun to think about raising teens yet, and he doesn't get unsupervised time with an iPad, but I'd love just to have a way to track how much time he actually spends using screens like that.