At some point it will be possible to create very realistic CP without using children. Actually it might already be possible to do that. One would have thought that would solve most of the problem: create "artificial" CP with strict controls to ensure children are not involved, and let the weirdos watch as much as they want. (Admittedly, there would still probably be some super-weirdos who would be totally turned off by seeing the "Attestation of No Children Involved" message at the beginning of their CP...)
But this comment seems to imply that there would be a problem with that? What is the harm in movies that harm no one?