Discussion isn't "efficient" !
Roundabout conversing is still optimal and useful in re the end goal of hitting potentially unreachable topics, and just because they are far-removed from the core topics or the central themes of the OP does not mean that they aren't still enlightening topics!
I left Reddit because it became more interested in policing rather than discourse, and I am so fudging blown that HN is devolving into the same priordial soup of authority that is more concerned with making sure that every submission has a pristine set of comments rather than a potentially controversial battery of back-and-forth argumentation.
Instead, why not allow anyone with +500 comment karma the authority to flag a post and if 3+ users flagged the same post it would die? It would be visible at inception but as time went on, if it was shitty it would get killed... Sure some folks would see shitty posts, but that's ok! Who cares? Its nbd, I see shit all day via the internet and I dont stop browsing! That way normal people could still influence the future of discussions while not deliberating precluding newbs posting just out of a silly fear of low-quality content...
Am I crazy or is what I'm saying make sense to the masses?