I agree 100% with you on this:
The way I like to think about this argument compares Steem Power holders to bitcoin miners. If someone invests $10,000 in a miner to obtain their "fair share" of the bitcoin rewards pool, no one complains at all. No one cries foul-play or considers that person a bad actor, even if their actions and investment decrease the rewards for everyone else. If that same person invests $10,000 in Steem Power and starts posting, commenting, and voting all their own stuff up with a similar mindset that a portion of the rewards pool is their "fair share" based on their investment, are they actually wrong? Just as the Bitcoin protocol allows for ASICs, the Steem blockchain allows for self-voting (and there is no real way to stop it anyway). If a Steem Power investor doesn't see an ROI incentive here, they will go elsewhere and the value of the entire network could go down. We all have an incentive to see Steem investors gain rewards, stick around, and bring in more Steem investors.