I'm not sure I agree. I think that there needs to be space for creators that just post, and curators that just comment...
To be specific: the internet's done a pretty good job of identifying and nurturing the value of creators, although it's done poorly with rewarding them, relatively. But the commenters/participants have gone entirely unrecognised despite them being the core that makes everything on the net possible.
Don't get me wrong, I intend to do both, but I think the key thing that will set Steemit apart, is how it rewards the viewers, and sets up a positive feedback loop where better comments mean more value, and more value means better comments... and this is besides the additional fact that this loop also affects the creators with more exposure.