I don't know about you, but I would not want to hire someone who can take any task and complete with minimal issues. Where I work, one is encouraged to argue about what is not right in the meetings and offer better solutions.
This candidate is doing exactly that: Argue why a certain hiring methodology is not effective and what a better alternative is. Considering that this candidate does not just follow orders but challenges the status quo and the fact that he has volunteering-based projects to show makes this author very likely a good fit for my organization.