You're not going to find many here that are openly sympathetic to your cause. You can see how that material makes people uncomfortable, right? They're essentially children, physically. Coontown was a legal forum technically as well. Doesn't mean it wasn't a necessary culling.
"They" aren't essentially children, "they" are essentially drawings. There isn't even a "they" there, we're talking about representations, not people.
I don't really see it as a moral issue. So for me that is reason enough.
There are some number of people who look at illustrated porn about children and see it as relief of some undeniable urge they experience and loath, and there are some number of people who see it as encouragement to pursue some predatory shit. I don't really know what the balance is for the anime kiddy stuff on reddit, I certainly didn't participate there. Was it stoking fires of predators or damping fires of people struggling with ugly urges? Just because the second exists, you can't dismiss the first out of hand.