Yep, it's the naysayer's go-to response. It amounts to a declaration that unless something is 100% effective, it's useless. Binary.It occurres to me that anytime the issue of trying to reduce/limit something comes up, the instant response from those who are against such things is "But criminals will still get it".
Sure, but the point is to reduce the likelyhood of that happening. Which leads to the question why this is such a bad thing.
Murder has been illegal for millennia, and there are still murders, but I don't hear the naysayers advocating to take the murder laws off the books. Funny, enit?