Have bans on chemical weapons been completely useless, might as well get rid of them all too? Or nuclear non-proliferation? Certainly have not been entirely s

Have bans on chemical weapons been completely useless, might as well get rid of them all too? Or nuclear non-proliferation? Certainly have not been entirely succesful, but I wouldn't want to get rid of them. As with chemical weapons, they'll still exist, and they'll still be used. But getting the most powerful nations to agree that they are unacceptable and their use has consequences in the international community matters for whether they quickly become pervasive. Vs. allowing the US and Russian defense industries to be in a race to equip the entire world with them as quickly as possible.