Q: Why is child pornography illegal?
A: Because it requires real life children to be abused in real life
Q: Why is CG / drawings of child pornography controversial?
A: Because we don't know if it will lead to real children being abused in real life.
Does this answer your questions?
We also don't know whether some arbitrary behavior will result in eternal damnation, so just to be safe let's make everything forbidden in any religious text illegal. This is a very slippery slope, and I don't see any reason why we should FUD our way into banning drawings but reject Sharia law. It's the same logic.
You would not get (much) child molestation if there was no public for these images in the first place.
So on one side, it's forbidden to share pics of real children (for the reasons you mentioned), but it's fine to check/sell drawings of children being molested. It just seems very counter productive to go both ways at the same time. You can imagine that people who already enjoy drawings would also enjoy pictures and therefore actively look for them.
You don't know that. Also, your argument sounds very similar to those that blame violent video games for actual acts of violence in society; which is also a very dubious position to hold. Afterall, Japan has some very violent Anime and yet I'm pretty sure incidents of actual violence in Japan is lower than most firstworld countries.
So what do you want to do with paedophiles (which is, IMO, just as valid sexual orientation as hetero- or homosexuality, and isn't a person't choice)? Kill them all?
I see the solution that allows them a legal fulfillment of their desires (i.e. by jerking off to images) as superior to a solution that only provides illegal sources of pleasure (illegal child porn/child molestation).
Citation needed.
We are now entering the "do video games cause violence" discussion hall. We take a number. It's ZY412787A331992. The 90s LED display mounted on the south wall says "unmoderated caucus".
We take a seat, close our eyes, and relax in the echoes of decades of brouhaha.
Do you want a drink?
Actually we are not. I am merely saying that the market of legal questionable things is likely increasing the market of illegal things, not talking about pictures causing rape directly.