Yes, you've explained it well. The engagement circles that Tony has mentioned are exactly that - all writers on Medium who are interested in Medium. It's why stories about Medium do well. But I'm not really an expert in anything, so I'm not ticking the boxes anymore. I find experts and interview them because I'm a writer. Those articles do very badly on here because people aren't interested in my interviews. You're right. Tony wants experts in their trades - not people like me, or people who are learning to write.