Look at it the other way: is Scratch appropriate for adults? Does it only exist because of children? I would say yes. In a hypothetical world of super-geniuses

Look at it the other way: is Scratch appropriate for adults? Does it only exist because of children? I would say yes. In a hypothetical world of super-geniuses, existing programming languages would be the new Scratch and adults would use something more advanced. I don't think it's offensive to consider programming paradigms that would be too difficult for most people to ever wrap their heads around.