YC launches aren't gaming HN - they're specifically placed on the front page. This is one of the three things that HN formally gives back to HN in exchange for funding it. All this is in the FAQ: https://news.ycombinator.com/newsfaq.html.

If you think it's easy to game HN, please tell us who's doing it (with links) so we can investigate. We put a lot of effort into trying to prevent that.