their fueled passions and arousal may overcome their restraint to seek out your kids,
There is not much to support this. Many also argue that pornography give a alleviates the desire. Who knows, probably both depending the individual. Would the Columbine shooters come up with the fantasy that became reality without playing Doom (or whatever game it was) obsessively, probably not. Would many here go into a nerdrage and kill people at work because of extreme dissatisfaction with their mediocre jobs without the outlet gaming provides them, probably.
I'm not for passing laws because we did a sociology 'study' and 'calculated' the net benefit to be on one side.
Are child porn producers harming children? Yes. That should be illegal.
Does purchasing child porn directly support the production of more porn and harm more children? Yes. That should be illegal.
Does a creepy guy possessing images on his hard drive because he is likely a product of abuse himself, harm anyone else? No. Or at best, we don't know and suspect that it might lead to eventually harm children. It should not be illegal.