The human is smarter

So, you want to hire hundreds of thousands of moderators? The human is smarter, yeah, but not the bot doing the detection.

If they tune them, you use the methods and knowledge learned and adapt

You say it like "tuning them" is a magic trick, where they wave their hands a couple of times, and now the detection algorithms are smarter than the bots writing the comments. SOMEONE has to go in, and figure out the maths to make the detection algorithms smarter and better at detecting. That takes time and resources.

You're also forgetting that "tuning them" works both ways. The people writing the shit-post bots also work on improving their tools, to make them indistinguishable from human posts.

Also: how can you tall that "lol, kys noob" is written by a human, or by a bot? The vast majority of comments online are these short shit-comments.

I’m just saddened by the state of things and how much better everybody else is at things I always thought the left was good at

1. 4chan is not "magically" "good" at "OSINT". They fuck up a lot of things too. It just so happens that what they're most famous for required one dude who wrote a script, a bunch of kids with bandwidth to spare.
2. Their OSINT is super iffy, hit-and-miss. Much like Reddit's. Or any other large enough community's.
3. What @AnotherUsername@lemmy.ml said.