I used to blog extensively, and I've spent a lot of time thinking about this. The content I would write was loosely for marketing purposes, but I put a lot of effort into generating high quality content that I would genuinely enjoy reading myself. An article that I spent 50+ hours on and felt very proud of might have a 30% chance of reaching the front page of Hacker News. A fluffy post with a decent title that I spent only an hour or two on would still have a 10-15% chance of front paging. The way the math works out, it's simply much lower ROI to generate quality content. It's also a bit heartbreaking to invest a lot of time making something for other people to enjoy only for nobody to ever see it.
The second chance queue on Hacker News is a major step in the right direction, and I'm grateful for all the times where my posts were given another chance. A lot of great content still slips through the cracks however, and relatively small actions by community members would go a long way towards helping incentives align towards generating quality content.