That's how I read it as well. I think it's wrong because I've learned the most from people one step ahead of me. Experts who are ten steps ahead have the curse of knowledge: it's extra hard to figure out what things make sense to a conference audience. Many presentations go too fast and then too slow two minutes later

Someone who just learned a thing is in the best position to give you the diff to learn it as well. At least, that was my experience running a blog as a teenager. I wrote about cool things I just learned or realised and people found that useful

Edited to add: Also, impostor syndrome. With this as the "first step" advise, you'll select people who are full of themselves and nobody else would give presentations unless their topic is super niche (not useful for most people) or they got lucky to see some big story up close (if you had a front seat during a Github outage, say). The latter is both interesting and fun but it's not the only type of talk I want to see