It’s a symptom of an imperfect commenting system.
With a better system, just like in real life, I would more easily be able to only pay attention to the things I want to pay attention to.
totally agree, but I'd love to see a technology that's even better than real life like a discussion site where for each post, users could navigate a 'discussion topology/taxonomy' (i don't know the real terms?). There wouldn't be a need for adding comments that are just restating a position, you would just 'vote' for the position. You could add a new position, a new reason for a position, or new evidence for a reason for a position. The meta discussion the topology itself would be interesting. It would rarely achieve conflict resolution, but it would force us to better define our positions/reasons/evidence/core beliefs, and maybe help us understand others
I've written about the pros and cons of the non-siloed format here, if anyone's interested: https://news.ycombinator.com/item?id=23308098. It leads to a rather paradoxical situation.