Did the internet provider have age verification? The DNS Resolution service? The SSL certificate authority? What about the electricity company? Or any other service or non-service provider which contributes in one way or another to online streaming, such as Logitech for providing a webcam, Dell for the computer, Nvidia for the graphics card.
After all, no grooming happened on omegle, that's just where they shared contact details. Grooming apparently happened on other platforms, and the common denominator seems to be the internet and everything that makes it work, not omegle.