Could say the same, if not even more so, about alcohol. But that has been a pervasive part of culture for thousands of years.

What are the risks, exactly?

I think it's similar to alcohol, there's probably no usage level that's "Safe" but there are ways to mitigate the problems. With weed, smoking it is certainly a terrible idea but many of the issues can be minimized by primarily using edibles. Just never a good idea to inhale anything that's combusted.

No, it is the children who are wrong.