Good story. I completely agree that all of this auto-curation will bury the eclectic collections and poison discovery.
That is one big reason I started my side project, curabase.com[1], to simply enable anyone to curate their own list of bookmarks. (Not a new idea, but it is MY idea based on this singlular thought -- that human curation will always be better, and NO. I don't have data to back it up :-)