Would you rather have a ruby-core of honest, hardworking developers who prefer to "delegate the task to other people" who are experts in security - because they admit their own weaknesses, or a ruby-core of arrogant developers who overstep their area of expertise just to try and deliver your "most secure ruby possible" - but more than likely worsening security?
It sounds to me like they're doing the most responsible thing they possibly can given the circumstances. If you or anyone else is in a position to do better, then by all means, step up and bless the ruby world with your supreme intellect.
admitting weakness + asking for help != dodging responsibility