There are numerous potential workarounds besides authoring a patch. And they can be distributed in a user-accessible fashion, like the workaround for the macOS

There are numerous potential workarounds besides authoring a patch. And they can be distributed in a user-accessible fashion, like the workaround for the macOS blank root password was. Not telling the world about it does not keep shit from burning down. Eliminating vulnerable targets is the only thing that does that. And that is more expediently served by full and prompt disclosure.