Its also important to choose your security battles. I imagine there was another severe bug or two in a project as large as OpenBSD.
That being said, thats a petty and ridiculous reason not to deal with someone's code. This gentleman strikes be as a builder, not a maintainer; someone who wants to breeze through town like a cowboy, bring cool ideas to fruition, and move on to the next conquest while someone else keeps the system from falling apart. Thats not a judgment, we need people like that, but they probably shouldn't be the ones fielding emails.