I guess the opposite case might not be as interesting to many, but I achieved basically unfiltered internet access as a child, and it has been immensely helpful for me as a person. Everything I am today -- a programmer, technically literate, a founder of a startup with momentum, I am because I had freedom and autonomy as a child (which was not granted to me, rather achieved by me). Many of the people of my age who grew up with strict controls and supervisory parents seem kind of lost and uninformed to me, now that they are turning into adults. I feel this narrative is surprisingly rarely heard on HN, but I cannot be the only one?
I also had the same experience (not just with Internet - I had unfiltered access to basically any and all reading materials), and I felt that on the whole it was a massively positive experience for me. I feel really sad for all the children today who mostly grow up in much more closely controlled environments. I understand why parents do that, but I'm also not at all convinced that most parents actually know what is good for their kids - just believe that they do.
I think the same for me, I’m pretty sure I wouldn’t be in my career if I had been restricted to an hour a day on a filtered iPad.
But I also think the internet has more potential for harm now. Widespread social media makes it easy for predators. YouTube actively incentivises content creators to produce brain numbing shit instead of the more amateur and educational content I was exposed to. Instagram creates vicious dopamine hooks that children have no mental defense against.
Also sorry to sound egotistical but I think I was an outlier that drifted into doing educational things, many or most kids will spend every moment they get just playing video games.
That being said, I’m in favour of parents doing the parenting, not the government.