The idea of deletionism to me is actually contrary to how the internet has developed, and is an anachronism due to the era and principles in which wikipedia was founded. The internet everywhere else outside of wikipedia's curated boundaries are defined by relevance as a filter upon what is assumed to be a limitless pile of results. There is no need to delete anything because being on the last page is equivalent (for everyone else who doesn't care) to not existing.
As such, it is my opinion that wikipedia's problem with deletionism is primarily a social one. Why not just sort pages based on a page-rank type model and curate based on that? (i would hope you guys are already doing that, and i will assume wikipedians are doing that)
Futhermore, i dislike and resent the notion that if something out in the world is wrong, you have to either drop everything and fix it, or stfu. This has always been a pernicious meme in the Open Source Community. There are constraints on people's time and resources. You know it, I know it. To call them names, or impugn their character because of it isn't fair. You 'begging' Zed (or anyone else) to fix wikipedia's problems or acquese to your accusations of being full of hot air is neither fair nor intended to encourage improvements in wikipedia or Zed's behavior.
People should be able to point out things that don't make sense, or aren't fair without being told that they're wrong to point out what they perceive as unjust.
Lastly, don't give into Zed's crazy alpha-male hierarchy dominance thing. Daring him to contribute to wikipedia isn't going to compel him, nor does it make him look like he's backing down. It makes you look like a jerk (even if you think he too is being a jerk).