No, I’d liken it to an adult giving a child alcohol. I don’t know of any children who pay for their own Internet access

Which is still forbidden, except if you are the parent and you are in your own home or anyway not in a public space. And if the kid is educated well, he would refuse alchool from an adult that is not his parent or relatives. If not maybe you should educated your kid better than that.

But I don’t know children that can pay for their own alchool either.

If your liquor cabinet at home isn’t locked, and your kid steals some, it isn’t any different than not having a locked down Internet connection.

Well, I don’t need to lock my liquor cabinet because I educated my kids.
And now that they are old enough they know that they can simply ask instead of stealing.