I think it's a little more complicated than someone being hurt by the individual act. I think the goal is to have the chasm you'd have to cross to go from not having sex with children to having sex with children to be as vast as possible, and for the feedback at every point to be "BAD!"
I guess what it boils down to, is do you think someone who fucks robots kids, and watches cgi kid porn is going to be more likely to go from that to real kid sex, than someone who's told no all the way. Or if you think someone who lives in a society that doesn't have as strong a taboo with child sex is going to be more likely to participate in child sex.
Personally, I think it's in our best interest to avoid an environment that says it's okay to go up to the line on that front. It's definitely thought policing, but sometimes that's just the common sense approach.
I guess what it boils down to, is do you think someone who fucks robots kids, and watches cgi kid porn is going to be more likely to go from that to real kid sex, than someone who's told no all the way. Or if you think someone who lives in a society that doesn't have as strong a taboo with child sex is going to be more likely to participate in child sex.
Personally, I think it's in our best interest to avoid an environment that says it's okay to go up to the line on that front. It's definitely thought policing, but sometimes that's just the common sense approach.