I would guess it's the exhibition of what some people would consider reddit-like behaviour that is the actual intended insult.

Or rather the behaviour exhibited by reddit denizens that gives it it's bad reputation, for some.

I could be wrong however.

And it's not like Reddit is exactly a hotbed of pro-AI sentiment either, for that matter. Though it does tend to be less extreme in my experience, I suspect because it's just got a larger population so social bubbles are harder to enforce.