> There's always a billionaire in the US happy to turn a blind eye

What does this have to do with enabling parental controls? You can define an allow list of websites to visit and disallow installing new applications. A billionaire turning a blind eye wouldn’t affect that, except in ways that would be very obvious to the parents like resetting the control settings.

> What does this have to do with enabling parental controls?

You're shifting responsibility to parents instead of asking billionaires to check kids' ages before letting them access porn sites, just like other businesses ask for ID when someone tries to buy alcohol or tobacco.

Telling parents to fix the problem isn't the answer, that's what governments are for: to regulate billionaires and hold them accountable.