Upvoting because you agree and downvoting because you don't is still the biggest problem with ranking posts and comments . If it can be fixed, the fix would have to somehow remove the emotional aspect of voting.
That said, I don't fully agree that the article didn't deserve to be on the front page of Hacker News. For me, and possibly other startup workers HN is a source of inspiration.
Any article related to problems, solutions and technology themes in general might serve as inspiration to a great startup idea. Wether it's the millionth article about bitcoin, or a post about Timmy stuck in a well.