You take the question as settled by people who have looked at it properly, and follow the age-banded guidance: none under eighteen months, an hour or so for the under-fives, consistent limits after that. The appeal is that it removes the argument from the household and puts it somewhere external, which is a real benefit and not a lazy one.
What it asks of you
- Keeping up, since the guidance has moved a lot and will move again
- Tolerating that the most-quoted numbers are the least evidence-based part of it
- Enforcing a limit you did not personally set, which is easier in some households and harder in others