I think it doesn't matter that abusing a robot that looks and acts like an abused child is better than subjecting an actual child to it.
There are all kinds of things that are innate and natural and which we simply cannot tolerate no matter how natural they are. All kinds of violence are natural, and the only acceptable response to it is to fucking supress and control it. Clubing a woman over the head and dragging her off to your cave is natural, and should only ever be repressed, inhibited, controlled, not tolerated, mercilessly. All those words that in other contexts are bad, are bad in those other contexts. It's wrong to repress your desire to be an artist. We aren't talking about being an artist are we?
Merely for generic violence we just happen to have a few constructive uses for it, and so we have a few uses for those assholes. But what is the constructive use for people who have even a slight desire to mess with a kid that actually looks like a kid? (I'm setting aside the unfortunate class of people who are still kids and should not have to deal with adult life quite yet, but who through no fault of theirs or the people they attract, look sexually mature and attractive. That still needs to be dealt with and isn't tolerable either, but the crime is a different one.)
I see no benefit at all to providing quite this nature of pacifier outside of maybe some highly controlled clinical context where a doctor maybe uses it as part of some sort of therapy and not as mere supposedly victimless gratification of someone's otherwise harmful desires. The fact is the desires are harmful all by themselves.
I happen to think that animals are not sentient and that until one wins an argument with us about it, it's ok to own them as property and use them as property. I think, in a strict actionable legal sense, that there is no real basis for charging someone with any kind of crime if they say, boil kittens. I know we have animal cruelty laws on the books, what I'm saying is I don't think they actually are logically defensible if we are still willing to eat other animals that just aren't cute to look at. I don't think there is anything especially humane about being killed by any method, and pain and terror are utterly inconsequential next to the big problem of being killed at all. So, I don't think whatever we do to cows is significantly different or better even if it's painless. It may be better but not significantly so. Like if I burned your house down but I considerately waited until you finished watching a tv show.
And yet I could never bring myself to boil a kitten and if I knew someone who enjoyed boiling kittens, I would consider that person to be an incredible danger to everyone else. Anyone who would do that, means there is something incredibly and dangerously broken about them, and no one else is safe around them.
There is just no way to argue that the fact that we have the technical means to create an abusable child faximile, means that it's at all tolerable to allow anyone to actually use such a device. Whoever would use such a device, something needs to be done about that, and very little consideration needs to be given to their feelings on the matter. Intolerance? YES, of course, intolerance is the correct response to the intolerable.