This absolutely is a real problem, especially for younger kids. Have you talked to a teacher? Think things like "a kindergartner runs around grabbing teachers' tits and saying "I want to ..." lines you'd expect from a rape work like 50 Shades of Gray. It is neither in the child's interest nor in the interest of society at large to let that happen. And for every case that's as obviously bad as that one, who knows how many come off as creeps or even manage to appear normal from the outside, while suffering the trauma internally?
Remember, the status quo on the Internet is no control at all. Real-world sex businesses aren't allowed to get away with that, why should the Internet be exempt from laws? Just because the government is slow and incompetent to get started doesn't mean we can stick with "self-regulate, aka no regulation at all".
We can argue about exactly what the law should be, and we can argue how it should be implemented, but there absolutely must be something.