Your twist on the argument is a fair one since the commenter you're responding to is equating fishing a drowning child out of a river with fighting formal scrutiny regarding their lax approach to policing CSAM on /b/ and /hc/.
Emotional maturity is important. So is platform maturity. We are long past the point where "reader beware" and "it's just a hobby site" are good enough in an era where under-policed fora result in actual harm. I appreciate 4chan's strong stance on the topic of it not being their job to police their house... But I do often find myself cheering when someone compels them, as a site that receives 22 million unique monthly visitors, to act like they have any host responsibility.
It's hard for me to be deeply supportive, beyond my legal requirements to be so, of a site that hosts /b/, /pol/, /hc/, and /gif/ because it chooses to host them too.