Not quite... if you read my second link above, i do a pretty good job of explaining why. Basically, though voting for someone and giving them vests does decrease your percentage share of the system, it also increases the steem value of your holdings.

At the end of the day, what the vesting fund is is a way to mediate the exchange of voting power for steem. You give up some of your (relative) voting power and in return your steem value increases.

Now i suppose you could argue that the best startegy would be only to vote for yourself and award yourself vests and steem. But that only works in system. Youd be hurting the $ value of your holdings