That is one of the incentives to be a large Steem power holder... your stuff gets seen, there aren't many other uses for lots of steem power other than influence and a bit of curation.
There must be some incentives for ROI otherwise big accounts would just completely powerdown and potentially dump on the market and the price. That would ruin it for everybody since all rewards are dependent on the market cap.
The more value there is in accumulating steem power the better it is for everyone.
But you will still get rewards based on other users upvotes. A growing user base and a fair system that encourages quality content will influence the steem price in the long run. I think self voting is a glaring weakness of Steemit. You can just pay yourself $400 for nothing of you want. I'm not crticising you personally, it's the way the Reward Structure is set up that I have an issue with. I've enjoyed reading some of your articles.
I have a special friend that removes the value of my own vote... so you don't need to worry about that... see he has already paid a visit... If I didn't vote this in advance it would never be seen.