This is true, but its also true that a lot of times these bots will get to these articles first, and then because they come from a well-known or respected domain, they just get tons of upvotes anyways.

There's two separate problems: too much dead content, which imo, is ok, because the good stuff will usually rise to the top - you need some junk to find the gems; and bots automatically picking up and submitting content - no human discernment as to whether the link is actually HN-worthy. I think the mindlessness is more the issue being addressed here