Let's ban alcohol. What do you think?
That's pretty simplistic thinking.
Alcohol is a socially accepted drug and it's even used in religious ceremonies. So unless we ban alcohol then we have to permit other, equally dangerous drugs into the culture. Alcohol is a done deal, it's deep in society. It's going to be very difficult to root it out. Unless we do root it out then we need to allow more drugs to be legal in order to be fair.
This is using "fairness" in a totally bizarre way.
If you wife physically abuses your kids, then you too get to abuse them, to be fair and all, and only if she stops physically abusing them will you stop too. Make sense to you?