Why we blog. Bloggers understand. Broadcasters don't

One slide from BlogHer's social media survey stands out for me (pictured left, via Chris Carfi on Twitter) because it reveals the value of blogs and blogging. It's about the relationship, it's about communities of passion and trust and it's about people coming together with shared interests.
The best social networks perform all these functions. The greatest value emerges when people combine with purpose. It's clear from these stats that that's exactly what bloggers are doing and also what they think they are doing.

It's the community/conversational/let's get together and get something done feature I think media companies often miss, reverting instead to using blogs as broadcast on the cheap.
Some people just never really get how things are meant to be used, do they?