Whether Erlang is worth learning about is entirely beside the point. The issue is whether it's worth sand-bagging the content for everybody on the tenuous theory that Erlang repulses "the wrong kind of people for HN".
Simply, it gets annoying when pg turn HN back into social-experiment mode.
Your second sentence is ad-hominem idiocy and doesn't merit a response.
There has to be a better way to control the audience than intentionally ruining the content.