Thanks for your comments @knozaki2015, I respect your opinion as you know.

there is no point in buying steem and powering up.

Author rewards are 75% of the rewards on this system remember and although obviously this is a high percentage there is Curation to consider! This means being able to help with quality control, the more power the more control. You can bring to light the issues you'd like to be discussed. With enough power you can claim terrible , slanderous , even plagiarism as good content... Now the good part about having this power is to also down vote this bad content. But do you think one should always say there content is the better content? The quality content? If every self votes then is that really selection?

I understand that a small fraction of the reward pool is going to these large accounts in the large scope of things and I read these articles. But as you said being able to decline part of your payout , which you would with declining just your self-vote, it would allow for a distributed reward pool not effected by self promotion, true quality control on your own content can't come from yourself.