(not parent) I think it is pretty easy to substantiate it (some people are actually deficient), but hard to substantiate to the degree that would justify the measures people propose. Yes, you can find a few nutjobs, but do they justify these truth-seeking policies for the general population? What suggests that these policies are even beneficial?

But even if it was shown to be beneficial, I would still be against it on moral grounds I suppose (but I'm not sure since that might depend on how "beneficial" it is).