People used to tell kids to not go to a shady part of town while they spent their afternoons outside unsupervised. Can parents not tell kids to not go to certain websites? We still went to the shady part of town and the kids will still go to 4chan but at least we don't need to give away freedoms. Such erosion of freedom for the common person because parents can't have an awkward conversation is irritating.
I'm moving away from that line of thinking. We can discuss how poorly formulated this law is, and the implications for privacy of internet control bills, and the resulting eroding of our freedom of speech. It's correct to be suspicous of attempts to regulate the internet. But I'm becoming increasingly convinced that "for the sake of the children" such measures are necessary. The reality is that most kids these days have basically zero restrictions on internet exposure, and it's frying their brains[1]. Casual warnings from parents won't cut it. Not that they don't have the ultimate responsibility, but as in every other area of child rearing, they need help from the wider society they live in.
[1] I'm not going to quote studies, but plenty exist. I think it's pretty self evident to everyone here how bad internet can be for the mental health even of adults, let alone children with developing minds.