I agree, the point of making usage monitored early on is so that you can train your child in what to do when they encounter stuff online. As that training has occured then you can begin to loosen the restriction and give them more freedom. This is the job of parenting. You are teaching your child how to safely and productively engage with the world and the younger they are the more of your time and attention this requires. If you don't teach them someone else might and that lesson may haunt them for the rest of their life.