I don't think you fully understand what Blarting is if you think it applies to your mindset. I agree, a lot of the times people talk about vtubers who aren't really related here, but at the same time most of them only get a handful of posts either offhandedly or when they're relevant so your worries are unfounded. Most of the time, anyways. People just bring up people like Bao or Lumi or whatever here even if they're not doing anything with anyone in this sphere of influence at the moment just because they've collabed a few times which is fine, but they never get mentioned enough to meaningfully change the thread. Like shit, the only people I can think of off the top of my head who rarely collab with anyone recently/aren't lewdtubers yet still get brought up on a near-daily basis is Bunny and Momo, and even just saying that is stretching the definition of "rarely collabing" in the first place since they were part of the games every week for the like half a year it went on.
There's really no good examples of people with no relevance who get consistently talked about basically, and that's a good thing.