You have a kid, you have responsibility for that kid. In Germany we have a term "Aufsichtspflicht" for this, which roughly translates to duty of supervision. Up to a certain age of the kid parents will be made responsible for damages your kid caused. One pretty funny example of that was a kid spending 1000s of Euros on a MMORPG because the MMO offered a payment option that allowed people to pay through their phone bill. Parents could've easily prevented any of that happening, but in that generation it was pretty common that kids were tech savvy while parents couldn't be bothered to learn about computers, which imo already is problematic.

Nowadays there are many many ways to supervise your children's online access. And yes, there are also many many ways for kids to work around that too, but ultimately if you buy your kid a device with internet access, you should try to supervise that. Parents need to care more about what their children are up to, instead of silencing them with a tablet for a moment of personal silence.

¿What are those ways?