The majority of users don't want to lock their money which means many users are excluded from participating.
Authors don't need steem power to participate. Long and short term traders don't need steem power to participate.
If someone wants the privilege of voting to shape the nature of the content on the blockchain and the distribution of rewards, then I think it's fair and prudent for the content community to demand a demonstration of long term commitment to the platform. It's sort of like "proof of stake" at the content layer.
Possible compromises: Early withdrawal with penalty, distribute rewards as steem instead of steem power.
I know what you mean but i think the benefits of eliminating steem power outweight the benefits of keeping it.
It's also going to be more and more difficult to own a large piece of the pie as more users use steem and as the price increases, so the problem you mentionned is going to dissipate with time.