Unlike recreational drugs, motorcycles are a useful tool that enables society to go about its business.

Knives also enable me to prepare dinner and surgeons to remove my appendix.

I don't think that class A drugs carry the same risk/benefit ratio, do you?

Also, I think you missed the part where I said that society and family carry some of the responsibility for that child taking drugs, but then you were too busy arguing the point you wanted to make rather than actually tackling what I said directly.