expectations around "strategic planning" and "marketing/PR" are not realistic. You should just be glad these randos don't have admin access to the Github org anymore. Any one of them were huge targets for adversaries who want to ship malware in Rubygems, supply chain attacks are very real and having commit access directly to rubygems/bundler is too powerful for a rando.
my main takeaway from reading all this is why were so many assorted people given such high levels of access..
also, if you step back, Ruby's problem is it consists of a fading community of millenials and Gen Xers who first came to Rails when it was the best/coolest option. however with the majority of builders now turning to JS for web, Rust (and Go) for systems, and Python for ML, it doesn't have a use case anymore that can drive a community or any hope for growth in the future. so a "niche DSL" for legacy webapps and plugin systems is what's left IMO, but i'm sorry for being super frank about it
languages like this with a shrinking community and loose security policies pose around the centralized package management system pose high security risks to its users.
Also, commit access to Github doesn't even say anything about access to deploying the actual package on rubygems. If security really was the goal, there were a million less invasive ways to make this change then revoking commit access from the active maintainers. Set up branch protections, require approvals, etc. There are a lot more tools in the toolbox other than "remove all of the maintainers".