You probably meant it slightly differently, but improvements that make things worse are per definition not improvements.

I get that people don't want HN to get worse than it is. But i don't get why people think open sourcing it would result in that.

I trust PG would be the kind of project lead who only accepts pull requests that would actually improve the site.

And I trust the community has a lot of smart people who would come up with solutions that would actually improve this site.