Say you were a guardian or parent and get to decide when a child can get a phone or use a computer and get internet with it. If you wish you can also install software and change router settings to what you see fit.
Some parents decide to forbid the internet completely, others are more relaxed. Some go the helicopter route, and some do not care whatsoever what their kid does online.
What is your policy on letting a child use the internet?
I don’t know, I spend a lot of time on the internet so it would feel hypocritical to limit it to a big extent, but I’m not sure if it would be doing someone a disservice to raise them to be like I am. Maybe I’d keep some desirable stuff blocked just so they’d have an incentive to go over to a friend’s house where it isn’t blocked.