Absolutely agree, besides a few outspoken Steem advocates on Youtube like @trevonjb @jerrybanfield (and to a lesser extent @jeffberwick who mentions it a couple times but doesn't focus exclusively on it), there isn't really that much promotion of Steem on external channels.
This brings up the question though, right now if thousands of new users were signing up every day and it blew up, wouldn't that dilute the amount of Steem we all can get here and therefore hurt it in the long run? The Steemit team may certainly be able to adapt to this later down the road, but from what I understand seems that's the way things are now.. correct me if I'm wrong though.
PS - Just followed you!