I think that you do have a point on the fact that quality content is not what is rewarded on Steemit exclusively. This is NOT about who writes the best content.
In my opinion, I think a big part of Steemit rewards has to do with following/popularity and originality. The ones that have the largest following and have been here the longest just seem to know how it works and yes, whales do support each other consistently.

At least I will upvote you.