Agreed, although I do think that if millions of people flock to Steemit and people are able to largely recreate their friend networks on here mimicking their networks on FB, they they will be upvoting and replying to each others' content fairly often and regularly, even for posts devoid of much meaningful content, kind of how one sentence tweets can get thousands of retweets and likes, for example. Of course, that is a potential risk of the content quality degrading, but that will be entirely up to the democratic nature of people upvoting posts that are meaningful and helpful.