What makes you think they _haven't_ tried to work things out with Ruby Central? As per a separate article[1], this seems to be a last resort:
> “Since Ruby Central has informed us they will never allow us to continue working on the projects they now claim they own, that we successfully maintained and operated for the last ten years, the former RubyGems team is launching gem.coop today.”
> “Since Ruby Central has informed us they will never allow us to continue working on the projects they now claim they own, that we successfully maintained and operated for the last ten years, the former RubyGems team is launching gem.coop today.”
[1]: https://socket.dev/blog/gem-cooperative-emerges-as-a-communi...