"And come on, it's where all the memes are born." It is not where all of the memes are born, much less the useful ones. If you claim otherwise, please tell me what I am missing.
A 4chan meme making its way into Apple goes to show how influential that site can be.
Speaking of influential, check out the extensive Wikipedia page on the meme. The RickRoll has showed up in the Macy's Thanksgiving parade (with Rick Astley in person), a video from Nancy Pelosi, and a tweet from the White House Twitter feed. It is fully part of the pop culture.
Don't forget the Anonymous cracking outfit.
My point is that he is vastly overstating its influence. The millions of 4chan users have produced _maybe_ as much influence as a single pop music star.
"The millions of 4chan users have produced _maybe_ as much influence as a single pop music star"
You answered your own question.