I see it somewhat differently.
In the OpenBSD world, security isn't something that comes later via an endless stream of patches, like it does within the Ruby community.
Security is done proactively in the OpenBSD realm. Care is taken to develop software that's secure from the very beginning, with security-related patches being a rare occurrence later on in the extreme case that something was accidentally overlooked.
The Ruby and Ruby on Rails way is incompatible with the OpenBSD philosophy. Were Ruby, Rails and related software developed properly, there wouldn't be the need for constant hand-holding from the OpenBSD package maintainers. I don't think that the OpenBSD developers should be held responsible in any way for the negligence of the Ruby community.
Getting rid of these questionable ports is a good example of the proactive approach to security taken by OpenBSD. Constantly patching low-quality software is not the correct way of dealing with the situation. Essentially getting rid of this code is the correct approach, and that's why it is good to see the OpenBSD developers following that path.