Yeah or maybe most parents don't care because they think you're wrong? Many people with young kids now grew up with the internet as kids themselves. They remember their parents going through the exact same moral panic about the internet in the mid 90s, they remember using it anyway with no restrictions whatsoever ... and they remember they grew up just fine.
When I was a kid I was logging in every night, talking to random strangers online, I even met up with a few as the years passed. Everything was fine. If you were right that it's as bad for a child's development as drink and drugs I should have ended up a burned out husk. Not only did I not, none of my friends did either and they all also had unrestricted access to the internet.
Regulations aren't the answer. They hardly ever are. Half of HN's content these days is just people being faced with the negative consequences of regulations they themselves supported and then doing a No True Socialistman meme: "good regulations haven't been tried yet!"