Prosecutable cases of drug use would be rare, if there were no serious attempt to go after drug users, so this statement doesn’t say much. I don’t know if voter fraud is common or essentially non existent, but if no serious attempt is made to prevent or find it, how can we know? I know someone who volunteered to help during elections, and complained that too much of the process left things with one person able to allow or commit voter fraud. He was rewarded by not being called back to volunteer again. (Perhaps he wasn’t called again for other reasons, but the problem existed, and it was unlikely to be solved.)
Too much is at stake for us to say that the problem is non existent.