Imagine you know nothing about Erlang, as the poster was pretending. How do you decide if it's worth your time to learn more about that language/platform? Certainly what the official website tells you factors into that largely.
You seem to be looking into this from the perspective that everyone must already know what Erlang is all about, so there doesn't need to be an effort to reach out to new users - which would contradict the questions the OP is asking.
I'm not saying that Erlang shouldn't reach out to new users. I'm saying that new users should look past the website and put in a little effort to know about Erlang. Dismissing a language because of the its website is not just right.
You seem to be looking into this from the perspective that everyone must already know what Erlang is all about, so there doesn't need to be an effort to reach out to new users - which would contradict the questions the OP is asking.